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CONCEALED-HEAD SELF-CLINCHING STUDS AND STANDOFFS BULLETIN CH 412

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Page 1: Studs and Standoffs

CONCEALED-HEAD SELF-CLINCHINGSTUDS AND STANDOFFS BULLETIN

CH

412

Page 2: Studs and Standoffs

Concealed-head Stud Concealed-head StandoffBack side of sheet remains smooth

PEM® self-clinching concealed-head studs and standoffs install permanently in steel or aluminum sheets as thin as .062” / 1.6mm to provide strong and reusable threads for mating hardware in a wide range of thin-metal assembly applications. Their concealed-head feature contributes particular design benefits by allowing the side of the sheet opposite installation to remain smooth and untouched. This feature additionally serves to satisfy applications where the sheet must remain completely sealed from air, liquid, dust, gases, or other potentially infiltrating elements.

Sheet preparation for their installation requires only a blind milled hole to the recommended minimum depth. Using a PEMSERTER® or other standard press, installation is accomplished by placing the fastener in the hole and applying sufficient squeezing force. The fastener head then locks securely in the sheet and can handle substantial loads.

To meet national aerospace standards and to obtain testing documentation, Type CFHC studs can be ordered to NASM63540/4 specifications. Check our web site for a complete Military Specification and National Aerospace Standards Reference Guide (Bulletin NASM).

CONCEALED-HEAD SELF-CLINCHING STUDS AND STANDOFFS

Look for the PEM dimple trademark on studs and the PEM “two groove” trademark on standoffs.

CH-2 PennEngineering • www.pemnet.com

Page 3: Studs and Standoffs

ME

TR

ICU

NIF

IED

All dimensions are in inches.

Type Length Code “L” ±.015 Blind Min. Min. (Length code is in 16ths of an inch) Min. Mounting Depth Dist. Max. Thread Thread Sheet Hole Dia. of Blind A E C Hole Hole In Size

Aluminum Stainless Code .250 .375 .500 .625 .750 1.00 Thick- +.003 Hole Max. ±.010 Max. Attached

Steel ness -.000 (1) To Edge Parts

.112-40 CHA CHC 440 4 6 8 10 12 NA

.062 .172

.043 .041 .205 .171 .156 .135

(#4-40) CfHA CfHC .093 .075 .071

.138-32 CHA CHC 632 4 6 8 10 12 16

.062 .213

.043 .041 .250 .212 .188 .160

(#6-32) CfHA CfHC .093 .075 .071

.164-32 CHA CHC 832 4 6 8 10 12 16

.062 .290

.043 .041 .328 .289 .219 .185

(#8-32) CfHA CfHC .093 .075 .071

.190-32 CHA CHC 032 NA 6 8 10 12 16

.062 .312

.043 .041 .350 .311 .250 .210

(#10-32) CfHA CfHC .093 .075 .071

All dimensions are in millimeters.

Type Blind Min. Min. Thread Length Code “L” ±0.4 Min. Mounting Depth Dist. Max. Size x Thread (Length code is in millimeters) Sheet Hole Dia. of Blind A E C Hole Hole In Pitch Aluminum Stainless Code Thick- +0.08 Hole Max. ±0.25 Max. Attached Steel ness (1) To Edge Parts

M3 x 0.5

CHA CHC M3 6 8 10 12 16 20 NA

1.6 4.37

1.1 1.04 5.21 4.35 4 3.6

CfHA CfHC 2.4 1.91 1.8

M4 x 0.7

CHA CHC M4 6 8 10 12 16 20 25

1.6 7.37

1.1 1.04 8.33 7.35 5.6 4.6

CfHA CfHC 2.4 1.91 1.8

M5 x 0.8

CHA CHC M5 NA NA 10 12 16 20 25

1.6 7.93

1.1 1.04 8.89 7.9 6.4 5.6

CfHA CfHC 2.4 1.91 1.8

(1) Blind holes may be deeper than minimums except where sheet material is at or near minimum thickness. Fasteners should always be installed so the flange is flush with the surface of the sheet.

NA Not available.

L

E

A

C

.062” / 1.6 mm Max.

CONCEALED-HEAD SELF-CLINCHING STUDS AND STANDOFFS

CH C – 632 – 6

TypeCH = short shankCfH = long shank

PART NUMBER DESIGNATION

fastenerMaterial

CodeA = Aluminum

C = Stainless Steel

LengthCode

ThreadSize Code

ALUMINUM AND STAINLESS STEEL STUDS - TYPES CHA, CFHA, CHC AND CFHC

PennEngineering • www.pemnet.com CH-3

Page 4: Studs and Standoffs

ME

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NIF

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All dimensions are in inches.

Min. Type Min. Blind Depth Min. Min. Thread Thread Sheet Mounting of Depth A B C H Dist. Size Code Thick- Hole Dia. Blind Full Max. Max. Max. Nom. HoleC/L Stainless ness +.003 Hole Thread (5) To Edge Steel

.187 .250 .312 .375 .500 .625 .750 1.00 -.000 (4) F

.112-40 CSS 440 3(1) 4(2) 5(2) 6(2) 8(3) 10(3) 12(3) 16(3)

.062 .213

.043 .188

.041 .165 .212 .250 .188

(#4-40) CSOS .093 .075 .072

.138-32 CSS 632 3(1) 4(1) 5(2) 6(2) 8(3) 10(3) 12(3) 16(3)

.062 .290

.043 .250

.041 .213 .289 .312 .219

(#6-32) CSOS .093 .075 .072

.164-32 CSS 832 3(1) 4(1) 5(2) 6(2) 8(3) 10(3) 12(3) 16(3)

.062 .312

.043 .250

.041 .245 .311 .344 .250

(#8-32) CSOS .093 .075 .072

.190-32 CSS 032 3(1) 4(1) 5(1) 6(1) 8(2) 10(3) 12(3) 16(3)

.062 .344

.043 .375

.041 .290 .343 .375 .281

(#10-32) CSOS .093 .075 .072

.250-20 CSS 0420 3(1) 4(1) 5(1) 6(1) 8(2) 10(2) 12(3) 16(3)

.062 .390

.043 .375

.041 .354 .389 .438 .375

(1/4-20) CSOS .093 .075 .072

All dimensions are in millimeters.

Min. Type Min. Blind Depth Min. Min. Thread Thread Sheet Mounting of Depth A B C H Dist. Size x Code Thick- Hole Blind Full Max. Max. Max. Nom. HoleC/L Pitch Stainless ness Diameter Hole Thread (5) To Edge Steel

+0.08 (4) F

M3 x 0.5

CSS M3 4(1) 6(1) 8(2)

10(3) 12(3) 16(3) 20(3) 25(3) 1.6 5.41 1.1 5 1.04 4.2 5.39 6.35 4.8 CSOS 8(3) 2.4 1.91 1.83

M4 x 0.7

CSS M4 4(1) 6(1) 8(2) 10(2)

12(3) 16(3) 20(3) 25(3) 1.6 7.92 1.1 6.5 1.04 6.23 7.9 8.74 6.4 CSOS 10(3) 2.4 1.91 1.83

M5 x 0.8

CSS M5 4(1) 6(1) 8(1) 10(2) 12(2) 16(3) 20(3) 25(3)

1.6 8.74 1.1 9.6 1.04 7.37 8.72 9.53 7.2 CSOS 2.4 1.91 1.83

M6 x 1 CSOS M6 4(1) 6(1) 8(1) 10(2) 12(2) 16(3) 20(3) 25(3) 2.4 9.9 1.91 9.6 1.83 9 9.89 11.11 9.5

(1) Style #1.(2) Style #2.(3) Style #3.(4) Blind mounting holes may be deeper than minimums except where sheet material

is at or near minimum thickness. Fasteners should always be installed so the flange is flush with the surface of the sheet.

(5) If standoff is used as a bushing, the hole in attached part must not exceed “B” plus .020” / 0.51 mm.

CONCEALED-HEAD SELF-CLINCHING STUDS AND STANDOFFS

Length Code “L” +.002 –.005(Length code is in 16ths of an inch)

Length Code “L” +0.05 –0.13(Length code is in millimeters)

CS S – 632 – 6

TypeCS = short shank

CSO = long shank

PART NUMBER DESIGNATION

fastenerMaterial

CodeS = Stainless Steel

LengthCode

ThreadSize Code

L H

TYPE CSS TYPE CSOS

H

C

F

B

A

Style #2(Screw will not pass through unthreaded end)

Style #3 (Blind)

C

F

B

LA

Style #1

C B

LA

STAINLESS STEEL STANDOFFS - TYPES CSS AND CSOS

PennEngineering • www.pemnet.com CH-4

Page 5: Studs and Standoffs

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UN

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PERFORMANCE DATA(1)

Test Sheet Material Max. Cold-rolled Steel 5052-H34 Aluminum Thread Tightening Type Code Torque Installa- Pullout Installa- Pullout Ref. tion (lbs.) tion (lbs.) (in. lbs.) (lbs.) (lbs.)

Concealed-head Standoffs

440 4.75 4,000 300 2,800 200 632 8.75 4,500 350 3,000 240

CSS 832 18 4,800 400 4,000 270

032 32 5,500 450 5,000 290

440 3.8 4,300 330 2,900 220 632 7 5,000 360 3,200 240 CSOS 832 14.4 5,300 440 4,000 300 032 25.6 6,000 600 5,000 400 0420 64 6,500 650 5,500 430

Concealed-head Studs

440 4.75 1,800 240 1,400 130 632 9 2,500 260 1,800 160

CHC 832 18 4,000 270 2,800 180

032 32 5,000 290 4,000 210

440 4.75 2,000 240 1,500 200 632 9 2,700 350 2,500 260

CfHC 832 18 3,300 440 3,000 310

032 32 4,000 680 3,500 360

440 2.85 (2) (2) 1,400 125 632 5.4 (2) (2) 1,800 135

CHA 832 10.8 (2) (2) 2,800 145

032 19.2 (2) (2) 4,000 170

440 2.85 (2) (2) 1,500 190 632 5.4 (2) (2) 2,500 220

CfHA 832 10.8 (2) (2) 3,000 240

032 19.2 (2) (2) 3,500 300

Test Sheet Material Max. Cold-rolled steel 5052-H34 Aluminum Thread Tightening Type Code Torque Installa- Pullout Installa- Pullout Ref. tion (N) tion (N) (N•m) (kN) (kN)

Concealed-head Standoffs

M3 .55 17.8 1330 12.5 890 CSS M4 2 21.3 1775 17.8 1200 M5 3.6 24.5 2000 22.2 1290

M3 .44 19.2 1465 12.9 975

CSOS M4 1.6 23.6 1955 17.8 1335

M5 2.9 26.7 2665 22.2 1775 M6 7.2 28.9 2860 24.4 1915

Concealed-head Studs

M3 0.5 8 1065 6.2 575 CHC M4 2 17.8 1200 12.5 800 M5 3.6 22.2 1290 17.8 930

M3 0.5 8.9 1065 6.7 890 CfHC M4 2 14.7 1955 13.3 1375 M5 3.6 17.8 3020 15.6 1600

M3 0.3 (2) (2) 6.2 555 CHA M4 1.2 (2) (2) 12.5 645 M5 2.16 (2) (2) 17.8 755

M3 0.3 (2) (2) 6.7 845 CfHA M4 1.2 (2) (2) 13.3 1065 M5 2.16 (2) (2) 15.6 1330

(1) The values reported are averages when all installation specifications and procedures are followed. Variations in mounting hole size, sheet material and installation procedure will affect results. Performance testing of this product in your application is recommended. We will be happy to provide samples for this purpose.

(2) Not recommended.

Threads Fastener Materials Finish For Use In Sheet Hardness (3) Passivated Type External, Internal, 300 Series and/or HRB 70 / HRB 50 / ASME B1.1 2A / ASME B1.1 2B / Aluminum Stainless Steel No Finish tested per HB 125 HB 89 ASME B1.13M, 6g ASME B1.13M, 6H ASTM A380 or Less or Less

CHA • • • •

CFHA • • • •

CHC • • • •

CFHC • • • •

CSS • • • •

CSOS • • • •

CONCEALED-HEAD SELF-CLINCHING STUDS AND STANDOFFS

(3) HRB - Hardness Rockwell “B” Scale. HB - Hardness Brinell.

PERFORMANCE DATA(1)

MATERIAL AND FINISH SPECIFICATIONS

CH-5 PennEngineering • www.pemnet.com

Page 6: Studs and Standoffs

1. Mill a blind hole to the correct minimum depth. Fasteners may also be installed into through holes.

2. Place fastener into anvil hole.

3. Place the sheet over the shank of the fastener.

4. With punch and anvil surfaces parallel, apply squeezing force until flange is flush with mounting sheet.

*End mills available from PennEngineering. See chart below.

Types CFHA, CFHC, CHC, CHAConcealed-head studs

Types CSOS, CSSConcealed-head standoffs

D D

PUNCHPUNCH

ANVIL ANVIL

L + .250”/6.35 mm

L + .250”/6.35 mm

All dimensions are in inches.

Thread Fastener Type Required Size PEM Code End Mill Part No.

440, M3

CfHC, CHC, CfHA, CHA Studs .172” CHM-172 CSOS, CSS Standoffs .213” CHM-213

632

CfHC, CHC, CfHA, CHA Studs .213” CHM-213 CSOS, CSS Standoffs .290” CHM-290

832, M4

CfHC, CHC, CfHA, CHA Studs .290” CHM-290 CSOS, CSS Standoffs .312” CHM-312

032, M5

CfHC, CHC, CfHA, CHA Studs .312” CHM-312 CSOS, CSS Standoffs .344” CHM-344

0420, M6 CSOS Standoffs .390” CHM-390

All dimensions are in millimeters.

END MILL INFORMATION

Double-ended, two-flute H.S.S. center-cutting end mills are available from stock.

PennEngineering does not manufacture center-cutting end mills, but we do keep a supply in stock for your convenience.

CH-6

CONCEALED-HEAD SELF-CLINCHING STUDS AND STANDOFFS

ANVIL DIMENSIONS

INSTALLATION

UN

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Type Thread D Punch Anvil

Code +.003 –.000 Part Number Part Number CHA / CHC / CfHA / CfHC 440 .127 975200048 970200006300 CHA / CHC / CfHA / CfHC 632 .152 975200048 970200007300 CHA / CHC / CfHA / CfHC 832 .179 975200048 970200008300 CHA / CHC / CfHA / CfHC 032 .205 975200048 970200009300 CSS / CSOS 440 .170 975200048 970200014300 CSS / CSOS 632 .218 975200048 970200015300 CSS / CSOS 832 .250 975200048 970200016300 CSS / CSOS 032 .295 975200048 970200017300 CSS / CSOS 0420 .358 975200048 970200018300

ME

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IC

Type Thread D Punch Anvil

Code +0.08 Part Number Part Number CHA / CHC / CfHA / CfHC M3 3.4 975200048 970200229300 CHA / CHC / CfHA / CfHC M4 4.4 975200048 970200019300 CHA / CHC / CfHA / CfHC M5 5.4 975200048 970200020300 CSS / CSOS M3 4.33 975200048 970200014300 CSS / CSOS M4 6.36 975200048 970200016300 CSS / CSOS M5 7.5 975200048 970200017300 CSS / CSOS M6 9.13 975200048 970200018300

Specifications subject to change without notice. See our website for the most current version of this bulletin.

RoHS compliance information can be found on our website.© 2012 PennEngineering.

Technical support e-mail: [email protected]

Page 7: Studs and Standoffs

The ATLAS® ELASTITE™ nut is a threaded metal insert and washer encased in a synthetic rubber bushing. When fastened, it can provide a vibration dampening attachment point in a variety of applications. The Elastite nut is ideal for mounting small electric motors and electronic components. Ease of use also makes it ideal for consumer assembly and kit packaging.

ATLAS® ELASTITE™ NUT WITH WASHERNoise and Vibration Isolating Nut

EN-210

Features and Benefits

• Installs from one side of the panel.• Can be removed if necessary.• Dampens vibration and shock.• Good electrical and thermal insulation

qualities.• Resists galvanic reactions.• Provides light moisture barrier.• RoHS compliant.

Specifications subject to change without notice. © 2010

All dimensions are in millimeters.

(1) Unified sizes available upon request.

Body: TPE-V, 55 Shore A, black. TPE-V operating properties maintained in temperature range -40˚ to +120˚ C.Insert: BrassWasher: Steel, nickel platedThreads: Metric, 6H per ASME B1.13M

Material & Finish Specifications

A

B

C

Thread Part Grip A B C Set Hole Size In Sheet Size (1) Number Range Length +0.2

M4 x 0.7 AEENW-M4-3.0 0.5 – 3.0 17.7 15 3.7 9 10.3

M5 x 0.8 AEENW-M5-3.0 0.5 – 3.0 17.7 15 3.7 9 10.3

M6 x 1 AEENW-M6-3.0 0.5 – 3.0 19.3 18 4.3 10 13

M8 x 1.25 AEENW-M8-3.0 0.5 – 3.0 21.6 22 5.6 11 16

AEENW – M4 – 3.0PART NUMBER DESIGNATION

Type Thread Code

Max.Grip

InstallationSimply snap the bushing into a properly sized mounting hole. Then, thread a standard machine screw or bolt into the brass insert. Tightening the fastener secures the fastener into place. To remove, completely unthread the bolt or screw and pull insert out of hole.

Page 8: Studs and Standoffs

THE

SELF-CLINCHING

FASTENER

HANDBOOK

Page 9: Studs and Standoffs
Page 10: Studs and Standoffs

Brief fastener history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2How and why self-clinching works . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3Anatomy of self-clinching . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4Types of self-clinching fasteners . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5Importance of quality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6Reliability in service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7Installation procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8Installation problems and solutions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9Other considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10Questions and Answers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11Glossary of terms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12identification Trademarks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

contents

Page 11: Studs and Standoffs

the ideathat revolutionized

production fastening

hen K.A. Swanstrom founded Penn Engineering &

Manufacturing Corp. in 1942, he did so with a revolutionary new

product: an easy-to-install, self-clinching fastener that provides load-carrying threads in metal sheets too thin to be tapped.

At first, Mr. Swanstrom produced his innovative design with four machines in a Doylestown, Pennsylvania garage. This simple operation soon gave way to a modern facility in Danboro, Pennsylvania as manufacturers and engineers alike recognized the benefits of self-clinching fasteners. They not only reduced time, labor, weight and inventory on many assembly jobs, but they also opened up a whole new world for engineers and designers,

making a wide assortment of thin-metal designs possible for the first time.Industry-wide acceptance led to earnest production of self-clinching fasteners shortly after World War II. As industry’s need to hold together ultra-thin and ultra-light metals grew, so did the product line. Over the years the original self-clinching fastener design evolved to meet hundreds of new design applications.

Today, nuts, studs, spacers, standoffs, access hardware, and other components are used worldwide by a variety of manufacturers, including producers of telecommunication, computer, medical, automotive, and aerospace equipment and systems.

2

advantages of self-clinching fasteners:• Provide strong threads in metal as thin as .020” / .51 mm.

• May be installed using any parallel acting squeezing force.

• Provide high pushout and torque-out resistance.

• Do not require special hole preparation, such as chamfering and deburring.

• Reverse side of metal sheet remains flush.

• No retapping necessary after application.

• Low installed costs.

Page 12: Studs and Standoffs

how, why& whereto use self-clinching fasteners

roadly defined, a self-clinching fastener is any device, usually threaded, that when pressed into ductile metal, displaces the host material around the mounting hole,

causing it to cold flow into a specially designed annular recess in the shank or pilot of the fastener. A serrated clinching ring, knurl, ribs, or hex head prevents the fastener from rotating in the host material once it has been properly inserted (see page 4). Thus, self-clinching fasteners become a permanent part of the panel, chassis, bracket, or other item into which they are installed.

They also have greater reliability and more holding power than extruded/tapped or stamped threads. They are used chiefly where good pullout and torque loads are required in sheet metal that is too thin to provide secure fastening by any other method. Even if the sheet is thick enough to sustain tapping, it may actually be more economical to use self-clinching fasteners with gaugeable threads. They can be installed during fabrication to eliminate loose hardware during final assembly. In fact, the use of self-clinching fasteners often will allow the use of a thinner sheet. Because of their compact design and low profile, they provide for a neat appearance, too.

As a rule, a self-clinching fastener should be specified whenever a component must be readily replaced and where “loose” nuts and hardware won’t be accessible. If it appears that the attaching “nuts” and “screws” can’t be reached after a chassis or cabinet is assembled, self-clinching fasteners can be installed during metal fabrication and can simplify and expedite component mounting and assembly operations, including those performed in the field.

DESIGN FORMANUFACTURE AND

ASSEMBLY

Self-clinching fasteners help designers meet DFMA parameters which include:

• Fewer parts to handle. Hardware such as washers, lock washers, and loose nuts are no longer required in final assembly.

• Fewer assembly steps. Since the task of hardware installation is done during fabri- cation, the number of steps required for final assembly is reduced.

• Less total assembly time. Fewer parts and less steps mean shorter assembly time.

All of which lead to shorter time to market, improved quality through assembly simplification, and reduced overhead.

SPECIAL NOTE FOR INSTALLING INTOSTAINLESS STEEL SHEETS

One of the very basics of self-clinching is that the fastenermust be harder than the host sheet. Only then will the fastener

perform as intended. This is particularly challenging when installing fasteners into stainless steel sheet metal.

If your application requires that the fastener clinches intostainless steel, be sure you use the fasteners specificallydesigned for this purpose. Consult PEM Bulleitnn SS for

information on thse types of fasteners.

3

Page 13: Studs and Standoffs

the anatomyof self-clinching

Head

Component

Host Metal

Flush Mounted

Componentor Panel

Host Metal Flowsinto Undercut

Flush Mounted Hex Head ProvidesTorque Resistance

Direction ofInstallation Force

Host MetalFlows into Undercut

Ribs ProvideTorque Resistance

Flush Mounted

Direction of Installation Force

Host MetalCold Flows into Undercut

Direction ofInstallation Force

Serrated ClinchingRing ProvidesTorque Resistance

Back Tapered Shank

Component

typical self-clinching nut

typical self-clinching stud

typical self-clinching standoff

4

Screw

Page 14: Studs and Standoffs

basic typesof self-clinchingfasteners

nuts: Nuts with thread strengths greater than mild steel screws are commonly used wherever strong internal threads are needed for component attachment or fabrication assembly.

studs and pins: Threaded and unthreaded fasteners which are used where the attachment must be positioned before being fastened.

spacers & standoffs:Used where it is necessary to stack or space components away from the panel. Thru-threaded or blind types are generally standard.

flush fasteners: When installed, these fasteners are completely flush within the sheet. Many times these fasteners are installed into a flat sheet so that the fasteners will not interfere with later bending and forming operations.

floating nuts: This fastener compensates for mating hole misalignment by having a floating threaded element.

threaded accesshardware: Generally used on enclosures where the screw must remain with the door or panel.

locking fasteners: Provide a prevailing torque locking feature to restrict the rotation on the screw under adverse conditions of vibration. Locking features may include metal or plastic types.

non-threaded fasteners: Allow for quick assembly or removal of components without the need for screws or additional fastening hardware.

concealed-head: Installed into milled, blind holes so that one side of the panel remains unmarred. Studs and standoffs are generally available in the concealed-head type.

blind: Have closed ends that limit screw penetration and are useful for protecting internal components from damage by inadvertent insertion of extra long screws. Threads are also protected from damage and foreign matter.

right angle: Provide you with strong right angle attachment points in sheets as thin as .040”/1mm. These fasteners are a cost-effective replacement for: bent edge tabs; bent center tabs; bent flanges; angle brackets; tack welds; and loose hardware.

cable tie-mount: Self-clinching tie-mounts are designed to provide secure attachment points for mounting wire to electrical chassis or enclosures without the problems associated with traditional mounting methods.

sheet joining fastener: a self-clinching fastener that joins two sheets of metal or metal to PCB/plastic. The fastener installs smooth with the top sheet, and flush or sub-flush with the bottom sheet.

CUSTOM DESIGNS

Since there are a great many types of standard self-clinchingfasteners available, it is usually possible to choose one to meet

your design requirement. There are times however that a custom designed and manufactured fastener is necessary. If this is the case, PennEngineering can assist you with your requirement to

provide you with the best solution to your design.

5

Page 15: Studs and Standoffs

qualityof self-clinching fasteners

n order request comes to the desk of the buyer or procurement individual with

the words PEM® “or equivalent” written next to a specification for self-clinching

fasteners. Although a review of the manufacturer’s basic specifications will undoubtedly turn up a shopping list of “equivalents,” a purchase made on the basis of lower

price alone may prove more costly in the long run.

There are significant variations in the materials used, manufacturing process, quality controls and component dimensions that make the “same” product, made by different manufacturers, very different from one another.

Wire stock is used for the manufacture of many self-clinching fasteners. Basic blanks are formed on cold headers or cold formers; subsequent operations such as piercing, drilling, tapping, thread rolling, and slotting may be required.

Self-clinching fasteners are also made from free-machining, cold-drawn, low-carbon bar stock, a variety of free-machining and cold-drawn stainless steels, aluminum and phosphor bronze. They are formed on automatic bar machines and generally have secondary operations such as slotting, tapping or lock forming.

Finishing operations such as heat-treating and plating are equally sophisticated, and quality control measures must be monitored throughout the manufacturing process.

With so many manufacturing variables to control, there are several quality areas which must be examined before choosing the manufacturing of self-clinching fastener for your application.

These include:

installed cost ...the bottom line

When a designer investigates the desirability of using self-clinching fasteners, his calculations must offer a true picture of cost. If integral fasteners are now being welded, the cost of materials, labor and overhead must be factored into the final cost per fastener to grant an accurate comparison with the final calculated cost per self-clinching fastener. Rejects and spoilage due to failure of poorly designed fasteners will contribute to high production costs, so be certain that the fasteners actually purchased meet your engineering specifications.

DIMENSIONAL TOLERANCES: A self-clinching fastener requires very tight tolerances to maximize it’s performance. In a part that is specified with a dimension .010” / 0.254 mm a variation of only .002” / 0.051 mm can make a 20% difference.

THREAD FIT: A part may be specified because it meets one or more government specifications for thread tolerances. If equivalents are considered, be sure that they meet the same specifications.

PREVAILING TORQUE: Be sure that parts meet the prevailing locking torque specifications required.

HEAT TREATMENT: This is a very critical quality area. Improper heat treatment can cause a fastener to fail during or after installation. Improper tempering can cause fastener brittleness causing the fastener to crack; inadequate treatment can cause fasteners to be so soft that they are literally crushed during installation.

PLATING: Plating standards set limits for preparation of the metal, plating thickness, adhesion, rust corrosion protection, hours of salt spray testing, and other operations. A poorly plated part will diminish the appearance and performance of your final product.

PERFORMANCE: The fasteners should be tested to meet the manufacturer’s published performance data. In addition to basic performance testing, be sure the fastener also meets your requirements for vibration resistance, thread locking, heat, and electrical characteristics.

QUALITY CONTROL: Ensure the fastener manufacturer is ISO 9001 / QS 9000 compliant. This will help assure that all the above criteria is being met.

6

Page 16: Studs and Standoffs

reliabilityin serviceof a self-clinching fastener

he reliability of a self-clinching fastener in service depends on many factors, beginning with a properly sized hole, the thickness and hardness of the host panel,

proper installation and design of the fastener, and the application where the fastener is used.

There are three tests applicable to a self-clinching fastener to determine its reliability in service. The first, called torque-out, determines the fastener’s ability to resist rotation within the panel. This test often is made at the head of the fastener

often with values exceeding the ultimate torsional strength of the mating screw or nut.

A second reliability measure is pushout. Pushout values indicate the axial resistance of a fastener to remove it from the sheet opposite to the direction from which it was installed, and should be roughly 5 to 10% of the force used to install the fastener.

A final test is pull-through.(1) Pull-through is the resistance of a fastener to pulling through the metal sheet when a clamping torque is applied.

RELIABILITYFACTORS:

––––––––––––• properly sized hole

• sheet thickness

• sheet hardness

• proper installation

• quality of fastener

(1) Pull-through generally applies only to self-clinching studs and standoffs and is not shown in this chart.(2) See special note about installing into stainless steel on page 3.

Thread

Test Sheet Material

Size 5052-H34 Aluminum Cold-rolled Steel 300 Series Stainless Steel(2)

Installation Pushout Torque-out Installation Pushout Torque-out Installation Pushout Torque-out (lbs.) (kN) (lbs.) (N) (in.lbs.)(N•m) (lbs.) (kN) (lbs.) (N) (in.lbs.) (N•m) (lbs.) (kN) (lbs.) (N) (in.lbs.) (N•m)

2-56 M2 1500-2000 6.7-8.9 90 400 10 1.13 2500-3500 11.2-15.6 125 550 15 1.7 — — — — — —

4-40 M3 1500-2000 6.7-8.9 90 400 10 1.13 2500-3500 11.2-15.6 125 550 15 1.7 3000-5000 13-22 165 725 17 1.92

6-32 M3.5 2500-3000 11.2-13.5 95 400 17 1.92 3000-6000 13.4-26.7 130 570 20 2.3 4000-7000 22-31 170 750 24 2.71

8-32 M4 2500-3000 11.2-13.4 105 470 23 2.6 4000-6000 18-27 145 645 35 4 4000-7000 22-31 180 800 37 4.18

10-32 M5 2500-3500 11.2-15.6 110 480 32 3.6 4000-9000 18-38 180 800 40 4.5 6000-9000 26-40 230 1025 45 5.08

1/4” M6 4000-7000 18-32 360 1580 90 10.2 6000-8000 27-36 400 1760 150 17 9000-11000 40-48 450 2000 150 17

5/16” M8 4000-7000 18-32 380 1570 120 13.6 6000-8000 27-36 420 1870 165 18.7 — — — — — —

General pushout and torque-out values for PEM® self-clinching nuts.(1)

(unified and metric data)

7

Page 17: Studs and Standoffs

ast, simple installation saves time and money on the assembly line.

In just three easy steps, self-clinching fasteners can be installed with any parallel acting press that can be adjusted to optimum installation forces.

installationprocedure

Special considerations . . .1. Mounting holes may be punched, drilled, or cast; they should not be chamfered or have broken edges in excess of .005” / .127 mm. Hole tolerances of +.003, -.000 / +0.08 mm must generally be held. The fastener should be installed on the punch side if the sheet is .09” / 2.29 mm or thicker because of the piercing break-to-die diameter. Holes pierced in sheets thinner than .09” / 2.29 mm may have fasteners inserted on either side. In all cases, the manufacturer’s recommended “minimum centerline of hole to edge of sheet” distance should be observed. No deburring or countersinking is required.

2. Installation results in a flush surface on one side of the panel. Conversely, staked or crimped fasteners require special counterboring to obtain a one-sided flush surface.

3. When installing, the most important criterion is that the fastener must be squeezed into place. A hammer blow or impact does not allow sufficient time for the sheet material to flow into the recesses of the shank and undercut.

4. Because the installation equipment generates no excess noise or pollution, the fasteners can be installed anywhere in the production process. No special facilities, ventilation equipment, or safety procedures are required.

5. When installed using the recommended squeezing force (depending on the size of the fastener and hardness of the sheet metal), there is little or no distortion of the sheet or damage to the finished surface. Fasteners generally should be installed after plating, finishing, or anodizing. Although, with a proper plating process, they can be installed before plating.

First, insert the shank or pilot of the fastener squarely into a previously punched, drilled, or cast hole.

Next, apply force until the head of the nut contacts sheet. Some types of fasteners will be fully installed when the head is flush within the sheet.

Finally, install the mating piece from the side opposite the head of the fastener.

fastener installation “DOs”...DO provide mounting hole of specified size for each fastener.

DO make certain that shank (or pilot) is within hole before applying installation force.

DO apply squeezing force between parallel surfaces.

DO install fastener into punch side of sheet.

DO apply sufficient force to totally embed clinching ring around entire circumference and to bring shoulder squarely in contact with sheet. For some fasteners installation will be complete when the head is flush with the sheet.

fastener installation “DON’Ts”...DON’T install steel or stainless steel fasteners in aluminum panels before anodizing or finishing.

DON’T deburr mounting holes on either side of sheet before installing fasteners–deburring will remove metal required for clinching fastener into sheet.

DON’T install fastener closer to edge of sheet than minimum edge distance indicated in dimension tables–unless a special fixture is used to restrict bulging of sheet edge.

DON’T over-squeeze. It will crush the head, distort threads, and buckle the sheet. Be certain to determine optimum installation force by test prior to production runs.

DON’T attempt to insert fastener with a hammer blow – under any circumstances. A hammer blow won’t permit the sheet metal to flow into the back tapered shank.

DON’T install screw in the head side of the fastener. Install from opposite side so that the fastener load is toward the sheet. The clinching force is designed only to hold the fastener during handling and to resist torque during assembly.

DON’T install fastener on pre-painted side of sheet.

8

Page 18: Studs and Standoffs

installationproblems and solutions

Questions? Consult our Applications Engineering department.

problem possible cause solution

Fastener not seated squarely – reduced holding power.

Poor holding power – fasteners fall out of panel.

Threads tight – sheet buckles.

Poor holding power – nut off center of hole.

Tight threads, cracked.

Panel buckles badly with stud in .040” to .059” (1 to 1.5 mm) material.

Poor holding power of standoffs or studs in panel.

Head of flush-head stud or standoff cups.

Poor holding power.

Edge of panel bulges.

• Punch and anvil faces are not parallel. • Panel cocked during installation.

• Inadequate installation force.• Panel too hard for fastener material.• Countersunk hole in panel.

• Fastener over-squeezed.

• Oversize mounting hole.• Nut is cocked in hole and shears side of hole when installed.

• Shank length extends through sheet.

• Lack of countersink in anvil.

• Hole in anvil too large or chamfered.

• Punch diameter too small or not hard and flat.

• Die side of panel thicker than .093”/2.36mm may have hole too large for fastener due to necessary punch and die clearance.

• Mounting hole violates specified minimumn edge distance.• Nut is over-squeezed.

• Ensure that punch and anvil are flat and parallel and hard.• Ensure that large panels are held perpendicular to punch and anvil.

• Seat fastener against shoulder by applying more force or changing shut height of press.• Specify appropriate fastener material for sheet hardness, i.e., stainless steel (see note on page 3).• Do not countersink or deburr hole.

• Reduce installation force.

• Punch or drill hole to specified dimensions.• Check that shank of nut is squarely in hole before squeezing.

• Choose fastener with proper shank length for sheet thickness.

• Provide countersink in anvil to specified dimensions.

• Use anvil with hole per catalog dimensions.

• Punch must be larger than head of stud or standoff and preferable equal to anvil diameter.

• Punch hole under size and ream to catalog dimensions or change tooling to punch from opposite side of panel.

• Restrain panel or bracket in fixture during installation or move mounting hole away from edge.• Reduce installation force if possible.

9

Page 19: Studs and Standoffs

otherconsiderations

AUTOMATED ASSEMBLY

Since all self-clinching fasteners must be squeezed into place, any press or vise that provides the necessary parallel force may be used to install them.

A PEMSERTER® automated press should be considered for high volume installations. PEMSERTER presses are specifically designed to feed self-clinching fasteners automatically into punched or drilled holes in sheet metal, seating them correctly with a parallel squeezing force. Feeding rates are five to six times faster than manual insertions, and installation force is adjustable to compensate for variations in thickness and hardness of the sheet and the height of the fasteners.

Our equipment capabilities now incorporate “smart” tooling and software, automation, robotics integration, and in-die installation with the PEMSERTER in-die fastener feeding system which brings new dimensions to stamping capabilities and incorporates the latest technologies to deliver the performance that is needed to compete in the highly competitive stamping industry. It eliminates the secondary operations typically required for fastener insertion, thus reducing overall labor costs, improving part quality and dramatically improving product through put.

FASTENERS FOR NON-DUCTILE MATERIALS

With the arrival of P.C. boards, plastics and other fabricated materials, a need emerged for a fastener which would offer the same benefits as self-clinching fasteners but work effectively in these non-ductile materials. To address this requirement, PennEngineering offers PEM® broaching fasteners and ReelFast® SMT surface mount fasteners.

A broaching fastener is any knurled shank fastening device

that is pressed into a punched or drilled hole to provide a strong threaded attachment point in a non-ductile material. Specially formed axial grooves around the shank of the fastener

“broach” or cut into the material, creating a firm, interference-type fit, resistant to rotations. ReelFast® SMT fasteners mount to P.C. boards in the same manner as other surface mount components prior to the automated reflow solder process.

Regardless of theself-clinching fastener

you choose, it isalways recommended

that you obtain samplesto do your own testing.

The integrity of your product dependson the performance and quality of

these fasteners.

10

Page 20: Studs and Standoffs

answersto the ten mostcommonly asked questionsabout self-clinching fasteners

Q Does the shape of the self-clinching fastener change during installation?

A No, the fastener does not deform in any way. There is no flaring, crimping, swaging, peening or riveting necessary.

_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _Q What holds the fastener in the sheet?

A The squeezing force on the fastener causes the sheet material beneath the head to cold flow into the back-tapered shank or undercut of the fastener securely locking it in place.

_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _Q Do I need special equipment to install self-clinching fasteners?

A No. Self-clinching fasteners are installed using any type of parallel acting press which will squeeze the fastener in place.

_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _Q Won’t these fasteners fall out, twist out, or spin in their mounting holes if I tighten down too hard?

A No. Typical torque-out values are generally quite high compared to the rotational force that will be put on them. In fact, for most quality self-clinching nuts, the screw will fail before the nut rotates in the material.

_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _Q Can I install a self-clinching fastener with a hammer blow or similar force?

A No, a self-clinching fastener must be installed using a squeezing action. A quick impact installation will not allow sufficient time for the sheet material to cold flow.

_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _Q I would like to replace some of the welded fasteners I now use in my stainless steel fabrications. Is there a self-clinching fastener that will go into a stainless steel sheet?

A Yes. Self-clinching fasteners for stainless steel applications are available. These fasteners are generally made from specially hardened stainless steel and will install into sheets up to HRB 88 in hardness.

Q When using self-clinching fasteners, what are my panel requirements?

A Generally, there are two basic requirements. First, the panel must be a ductile material softer than the fastener which is going into it. Second, the panel must meet the minimum sheet thickness required by the particular fastener. Some self-clinching fasteners can be installed into sheets as thin as .020”/0.51mm, but generally .030”/0.76mm or .040”/1mm is the minimum sheet thickness necessary.

_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _Q Is there a maximum sheet thickness I should be concerned with before specifying self-clinching fasteners?

A Generally, there is no specified maximum thickness for sheets. However, because of their special design and function, a few fastener types do specify a thickness range which includes a maximum.

_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _Q I notice some of the fasteners have a hexagonal shaped head. Do I have to punch a hexagonal mounting hole to install these?

A No. All self-clinching fasteners are installed into a round punched or drilled hole. A hexagonal head will cause the sheet material to cold flow around the head to provide high torque-out resistance. The hex head will be flush in the sheet when installed.

_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _Q Can I install these blind, from one side, if I don’t have access to both sides of the sheet?

A Generally, you must have access to both sides of the sheet to properly install self-clinching fasteners. However, there are some 1/4”/M6 or larger nuts which can be drawn in from one side using an impact-torque wrench. For information on blind threaded inserts for one sided access installation go to www.pemnet.com.

11

Page 21: Studs and Standoffs

anvil - An insert, either solid or hollow, which is used on the underside of a panel to resist the installation force.

blind - A hole, usually threaded, which is open from only one end.

broaching - The act of cutting a shape in any object by using a mandrel of a similar shape. As applied to fasteners, the way a knurled shank “broaches” its way into the mounting hole.

captive - The ability of a fastener to remain securely attached to a panel.

captive screw - See: panel fastener.

chamfer - A beveled edge or corner.

cold flow - The movement of a ductile material under pressure.

concealed-head - A type of fastener which, when installed, is completely hidden when viewed from the reverse side.

counterbore - That portion of the axial length of which is drilled to a larger diameter than the remaining portion of the part.

ductile - Metal which is not brittle and can be easily formed or bent.

floating - The ability of a fastener to move in a direction parallel to the mounting panel and allow for mating hole misalignment.

flush - The ability of a fastener to be contained completely within the thickness of a panel. Also refers to the absence of a protrusion above the surface of the panel.

head - The portion of a fastener which forms its largest diameter.

installation force - A term expressed in pounds, tons, or newtons applied axially to a self-clinching fastener to achieve proper installation.

interference fit - The insertion of one member into another whose diameter is slightly smaller than the part being inserted.

knurled clinching ring - The displacer portion of a fastener which has corrugations and is used to develop torque resistance when installed in sheet metal.

locking element - A device employed to restrict rotation of a threaded member while operating in adverse environments, such as vibration and temperature. The nut-locking element provides prevailing locking torque to the mating screw.

minimum distance - The minimum distance from the center of a fastener mounting hole to the nearest edge of a panel which will keep the edge from deforming. This distance may be reduced by suitable fixturing or increasing thickness of panel material.

minimum sheet thickness - The thinnest section of a panel, usually measured in thousandths of an inch or millimeters, into which a fastener may properly be installed. The same fastener may be installed in panels having any thickness greater than minimum.

mounting hole - A properly-sized round opening in a panel to receive the shank of a self-clinching fastener.

panel fastener - A threaded screw which is held captive to a panel and which, when disengaged from its main nut, remains fixed to that panel.

pin - A captive post that extends from a panel.

plunger assembly - A spring-loaded device used for latching or indexing purposes.

positive stop - A visual indication that the proper depth of penetration of the knurled ring has occurred or when the “head” is in contact with the top surface of the panel. Synonym: shoulder.

pull-through - The resistance of a fastener to a force applied in the same direction to which it was installed.

punch - A movable insert, either solid of hollow, which applies an installation force to the top of the fastener.

pushout - The force required to remove a fastener from a panel in a direction opposite to the way from which it was installed. Note: Pushout is expressed in pounds or newtons.

rockwell hardness - A relative measure of hardness. Rockwell C Scale is used for hard materials, Rockwell B for softer materials, such as sheet metal.

self-clinching - The method by which a fastener is securely attached to a sheet of ductile material by causing the material to cold flow under pressure into an annular recess of the fastener thereby securely locking it in place.

self-locking - A locking element, formed as an integral part of a fastener, which provides force to restrict the rotational movement of a threaded member.

shank - The portion of a fastener, which is slightly smaller than the fastener’s mounting hole and provides a positive location for the fastener in the hole. A shank also incorporates an annular groove which becomes filled with panel material as the fastener is installed, and the retention of this material provides pushout resistance.

shank length - The actual length of that portion of a fastener which is embedded in the panel material.

shoulder - The surface area of a fastener which contacts the top surface of the sheet material. See: positive stop.

spring-loaded - A device having a separate moveable component that is biased in one direction by a spring.

standoff - A tubular device, usually threaded, for spacing or stacking components.

stud - A male threaded captive post that extends from a panel.

swaging - An operation whereby a reduced diameter of a fastener is deformed to secure it to a panel. Note: the antonym of swaging is self-clinching where the panel material is caused to deform.

thread class - A measure of clearance or fit between the screw and the nut taken at the pitch diameter.

threaded insert - A threaded device which is installed in a panel material.

through hole - A hole, threaded or unthreaded, which transverses the entire length of a part and is usable from either end.

tolerance - The absolute amount of maximum or minimum dimensional deviation allowed that will not affect the performance of a mechanical part.

torque-out - The amount of torque necessary to spin the fastener out of the sheet. This is torque applied to the fastener. No axial load is applied.

torque-through - The amount of torque necessary to fail the fastener in axial load.

undercut - The reduced diameter of a fastener which receives sheet material when a fastener is installed. Depending on the type of fastener, may be rectangular or back tapered in shape.

glossaryof terms

12 Expanded list of terms can be found on our web site www.pemnet.com/design_info/pem.html

Page 22: Studs and Standoffs

PEM® fasteneridentification trademarks

To help you identify genuine PEM® brand fasteners, most are marked by one of our registered trademarks. Genuine PEM brand fasteners can only be purchased from one of our authorized worldwide distributors. For a complete list of these distributors, check our web site: www.pemnet.com or call us at our main office.

13

PEM® Skirted Shoulder(Registered Trademark)Types PF11, PF11M, PF11MF, PF11MW, PF11PM, PF12, PF12M, PF12MF, PF12MW, PF7M, PF7MF

PEM® C.A.P.S.® Dot Pattern(Registered Trademark)Types PF11PM

PEM® Stamp (Registered Trademark)Types CLS, CLSS, PSHP, S, SL, SMPS, SP, SS, WN

PEM® Dimple (Registered Trademark)Types CFHA, CFHC, CHA, CHC, FH, FH4, FHA, FHL, FHLS, FHP, FHS, HF109, HFG8, HFE, HFH, HFHB, HFHS, KFH, KSSB, MPP, PF10, PF30, PF31, PF32, PF50, PF51, PF52, PF60, PF61, PF62, PF7M, PF7MF, PFC2, PFC2P, PFC4, PFHV, PFK, PFS2, PSHP, PFVM, PFVMF, SCB, SCBJ, SCBR, SF, SFK, SFP, SFW, SGPC, SKC, SKC-F, SSA, SSC, SSS, TFH, TFHS, TP4, TPS, TPXS

PEM® Single Groove (Registered Trademark)Types A4, BSO4, LA4, MSO4, PFC4, SO4, SP (Select sizes)

PEM® Two Groove (Registered Trademark)Types B, BS, BSO, BSON, BSOS, CSOS, CSS, DSO, DSOS, KF2, KFB3, KFE, KFS2, KFSE, PF7M, PF7MF, SMTSO, SO, SOA, SOAG, SON, SOS, SOSG, TSO, TSOA, TSOS

PEM® Double Squares (Registered Trademark)Types A4, AC, AS, LA4, LAC, LAS

PEM® Blue Nylon Locking Element (Registered Trademark)Types PL, PLC

Page 23: Studs and Standoffs

HB-112

Specifications subject to change without notice. See our website for the most current version of this bulletin.

RoHS compliance information can be found on our website.© 2012 PennEngineering.

Technical support e-mail: [email protected]

Page 24: Studs and Standoffs

UN

IFIE

D

All dimensions are in inches.

ME

TR

IC

All dimensions are in millimeters.

LCS-509Rev 809

PEM® six-lobe heavy duty self-clinching studs are typically used when high torque out and pushout and, if necessary, high tensile/shear strength are required. These studs are easy to install, have a low installed cost, and have consistent performance characteristics.

• Head strength is adequate to develop full thread strength.

• Can be used in material as thin as .036” / .91mm.• Easy to install. No welding.• Can be installed with automated equipment.• Installs into panels up to HRB 85 / HB 165.• Dog point and/or MAThread/MATpoint features

available.(1)

• Thread strength: grade 5 through 8 and property class 9.8 to 10.9

• RoHS compliant materials and finishes.

Available Features and Benefits

Thread Min. Sheet Hole Size In Sheet H L S T Size (2) Thickness Min. Max. ±.010 Length Max. ±.005 .164-32 .036

.178 .182

.350 .060

.060 (#8-32) .060 .250 to 2.0

.095 .190-32 .036

.206 .210

.370 .060

.070 (#10-32) .060 .095

.250-20 .036 .060

(1/4-20) .060 .272 .276 .470 .312 to 2.5 .095 .090 .090 .135

.313-18 .060 .095

(5/16-18) .090 .333 .337 .600 .135 .110 .120 .500 to 6.0 .180 .375-16 .090

.400 .404

.690 .135

.130 (3/8-16) .120 .180 .500-20 .090

.532 .536

.950

1.0 to 6.0 .135

.175 (1/2-20) .120 .180

Thread Size Min. Sheet Hole Size in Sheet H L S T x Pitch (2) Thickness Min. Max. ±0.25 Length Max. ±0.13

M4 x 0.7 .91

4.68 4.78 7.75 1.5

1.4 1.52 6 to 55

2.3

M5 x 0.8 .91

5.68 5.78 8.75 1.5

1.75 1.52 2.3 .91 1.5 M6 x 1 1.52 6.68 6.78 11 8 to 65 2.3 2.1 2.29 3.4 1.52 2.3 M8 x 1.25 2.29 8.68 8.78 15.25 3.4 2.8 3.05 15 to 152 4.6

M10 x 1.5 2.29

10.68 10.78 19.75 3.4

3.5 3.05 4.6

M12 x 1.75 2.29

12.68 12.78 20

25 to 152 3.4

3.8 3.05 4.6 2.29

14.68 14.78 22 25 to 152 3.4

4.5

M14 x 2 3.05 4.6

PEM® Six-Lobe Heavy Duty Clinch Studs

www.pemnet.com(1) PennEngineering is a licensee for MAThread®/MATpoint® technology, a registered trademark of MAThread Inc.(2) Part number will be assigned during quote process.

T

S

H L

Six-lobedesign

Look for the PEM “dimple” trademark

Page 25: Studs and Standoffs

Specifications subject to change without notice. Check our website for the most current version of this bulletin.© 2009 PennEngineering.

PEM® Six-Lobe Heavy Duty Clinch Studs

LCS-2

To be sure that you are getting genuine PEM® brand self-clinching studs, look for the “dimple” trademark.

The Trademark for Quality

Specifications

Threads - External, ANSI B1.1 2A ANSI/ASME B1.13M 6g(1)

Fastener Material - Heat-treated carbon steel (2)

Standard Finish - Zinc plated 5µm colorless (3)

For use in sheet hardness HRB 85 / HB 165 or less

(1) For plated studs, Class 2A/6g, the maximum major and pitch diameter, after plating, may equal basic sizes and be gauged to Class 3A/4h. Per ANSI B1.1, Section 8, Table 3A and ANSI B1.13M, Section 8, paragraph 8.2.

(2) Other materials available upon request.(3) Other finishes available upon request.

Installation

PEM® six-lobe heavy duty studs are installed by placing them in properlysized holes in the sheet or metal section and squeezing them into placeusing any parallel acting press. The metal displaced by the head flowssmoothly and evenly around the six-lobe anti-rotational feature, and intothe annular groove, locking the fastener securely in place.

Other Notes

Six-lobe available on special order only. For standard offering of heavy duty clinch stud types and sizes see PEM Bulletin FH.

Products are manufactured in ISO certified facilities and if required can also meet stringent industry specific certifications.

For quotations or questions regarding this product, please contact one of the locations below or your nearest PEM® engineering representative.

For the complete line of PEM® standard self-clinching fasteners and installation equipment, request our catalog or go towww.pemnet.com.

To meet your preferences and needs we offer studs with many different sizes, materials and coatings.

Stud embeds permanently into sheet. Head strength is adequate to develop full thread strength.

Page 26: Studs and Standoffs

SI® THREADED INSERTS FOR PLASTICS BULLETIN SI

212

Page 27: Studs and Standoffs

SI-2 PennEngineering • www.pemnet.com

•SIinsertsaretypicallyspecifiedinapplicationswherestrong,durablemetalthreadsarerequiredinplasticmaterial,especiallywherefrequentassemblyanddisassemblyoftheunitforserviceorrepairisnecessary.

•ApplicationsforSI®productsinclude:computersandterminalboards,automotive,electronicequipment,businessmachines,aerospace,communicationsequipmentandinstrumentcases.

•SIinsertsareavailableinbrass,stainlesssteelandaluminum.•SIinsertsareavailableinalargevarietyofultrasonic/heatstaking,molded-inorpress-intypes.•SIinsertsmeetthestrictestqualityguidelineswhicharemaintainedthroughin-processaudits.

ULTRASONIC / HEAT STAKING INSERTS•Ultrasonic-Installedbypressingtheinsertintothemountingholewithultrasonicinsertionequipmentwhilesimultaneouslyapplyingahighfrequencyvibration.Frictionalheatcausedbythevibrationmeltstheplasticsurroundingtheinsertallowingeasyinsertion.Whenthevibrationceases,theplasticsolidifies,lockingtheinsertpermanentlyinplace.

•HeatStaking-Installedbypressingtheinsertintothemountingholewithathermalpresstomelttheplasticsurroundingtheinsert.

MOLDED-IN INSERTS• Installedduringthemoldingprocess,theinsertsarelocatedinthemoldcavitybycorepins.Whenthemoldopens,thecorepinsarewithdrawnleavingtheinsertspermanentlyencapsulatedintheplasticsectionwithonlythethreadsexposed.

• Installingtheinsertsduringthemoldingprocesseliminatestheneedforsecondarystepsorinstallationequipment.

PRESS-IN INSERTS• Installedbysimplypressingtheinsertsintopre-moldedordrilledholes.Installationisaccomplishedusinganystandardpressatanytimeduringtheproductionprocess.

•Eliminatestheneedformolding-ininserts.•Eliminatestheneedforheatorultrasonicequipment.

SI® THREADED INSERTS FOR PLASTICS

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PennEngineering • www.pemnet.com SI-3

ULTRASONIC / HEAT STAKING THREADED INSERTS IUB,IUC(Tapered,thru-threadedinserts) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SI-4 IUTB,IUTC(Straightwall,thru-threadedinserts). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SI-5 ISB,ISC(Symmetrical,thru-threadedinserts). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SI-6 Performancedataforultrasonicinserts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SI-7

MOLDED-IN THREADED INSERTS IBB,IBC(Blindthreadedinserts) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SI-8 IBLC(Self-lockingblindthreadedinserts) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SI-9 ITB,ITC(Thru-threadedinserts). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SI-10 STKB,STKC(Knurledspacers). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SI-11 Performancedataformolded-ininserts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SI-12

PRESS-IN THREADED INSERTS NFPC,NFPA(Hexagonal,press-ininserts). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SI-13 PPB(Thru-threadedinserts) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SI-14 PFLB(Flange-headinserts). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SI-15 PKB(Straightknurlinserts). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SI-16 Performancedataforpress-ininserts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SI-17

SICustomDesigns. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SI-18HolePreparationGuidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SI-19SIPrototypeKit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SI-20

PART NUMBER DESIGNATION AND MATERIAL AND FINISH SPECIFICATIONS

IU B - 440 - 2

Length Code (where applicable): Seeindividualproductchartsforactualcorrespondingdimensionallengths.

Thread Code: Internal,ASMEB1.1,2B/ASMEB1.13M,6H ForTypesPPB,PFLB,andPKBcollapsedslotandburrsmaycauseprevailing torquewhilethreadacceptsclass3A/4hscrew. Seeindividualproductchartsforactualcorrespondingthreadsize.

Material Code: B=Free-machining,leadedbrass.Plainfinish. C=300seriesstainlesssteel.Passivatedand/ortestedperASTMA380. A=7075-T6aluminum.Plainfinish.

Type: IU=Ultrasonic,tapered IUT=Ultrasonic,straightwall IS=Ultrasonic,symmetrical IB=Molded-in,blindthreaded IBL=Molded-in,self-lockingblindthreaded IT=Molded-in,thru-threaded STK=Molded-in,knurled NFP=Press-in,hexagonal PP=Press-in,thru-threaded PFL=Press-in,flange-head PK=Press-in,straightknurl

TABLE OF CONTENTS

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Type Hole Size in Material Thread

Thread Length A E C

Size Brass Stainless Code

Code ± .005 ± .005 ±.005 Min. Hole D F Steel (1) Depth ± .002 ± .002

.060-80 IUB IUC 080(2) 1 .115 .141 .123 .155 .118 .123 (#0-80) 2 .188 .115 .228 .107 .086-56 IUB IUC 256(2) 1 .115 .141 .123 .155 .118 .123 (#2-56) 2 .188 .115 .228 .107 .112-40 IUB IUC 440 1 .135 .172 .157 .175 .153 .159 (#4-40) 2 .219 .149 .259 .141 .138-32 IUB IUC 632 1 .150 .219 .203 .190 .199 .206 (#6-32) 2 .250 .190 .290 .185 .164-32 IUB IUC 832 1 .185 .250 .230 .225 .226 .234 (#8-32) 2 .312 .213 .352 .208 .190-24 IUB IUC 024 1 .225 .297 .272 .265 .267 .277 (#10-24) 2 .375 .251 .415 .246 .190-32 IUB IUC 032 1 .225 .297 .272 .265 .267 .277 (#10-32) 2 .375 .251 .415 .246 .250-20 IUB IUC 0420 1 .300 .375 .354 .340 .349 .363 (1/4-20) 2 .500 .332 .540 .321 .250-28 IUB IUC 0428 1 .300 .375 .354 .340 .349 .363 (1/4-28) 2 .500 .332 .540 .321 .313-18 IUB IUC 0518 1 .335 .469 .439 .375 .431 .448 (5/16-18) 2 .562 .406 .602 .401 .375-16 IUB IUC 0616 1 .375 .563 .532 .415 .523 .540 (3/8-16) 2 .625 .493 .665 .488

(1) Thread tapped thru, Class 3A/4h screw must pass with finger torque, but basic go gauge may stop at last thread.(2) Diamond knurl.

Tapered Thru-Threaded, Types IUB™ and IUC™

• Designedforuseintaperedholes.• Taperedmountingholeallowsforrapidand accuratealignmentpriortoinstallation.

Type Thread Hole Size in Material Thread Code Length A E C Size x Brass Stainless (1) Code ± 0.13 ± 0.13 ±0.13 Min. Hole D F Pitch Steel Depth ± 0.05 ± 0.05

M2.5 x 0.45 IUB IUC M2.5 1 3.43 4.37 3.99 4.44 3.89 4.04 2 5.56 3.79 6.58 3.58

M3 x 0.5 IUB IUC M3 1 3.43 4.37 3.99 4.44 3.89 4.04 2 5.56 3.79 6.58 3.58

M3 x 0.5 IUBB IUCC M3 1 3.81 5.56 5.16 4.83 5.05 5.23 2 6.35 4.83 7.42 4.7

M3.5 x 0.6 IUB IUC M3.5 1 3.81 5.56 5.16 4.83 5.05 5.23 2 6.35 4.83 7.42 4.7

M4 x 0.7 IUB IUC M4 1 4.7 6.35 5.84 5.72 5.74 5.94 2 7.92 5.41 8.94 5.28

M5 x 0.8 IUB IUC M5 1 5.72 7.54 6.91 6.74 6.78 7.03 2 9.53 6.38 10.55 6.25

M5 x 0.8 IUBB IUCC M5 1 6.71 8.33 7.83 7.72 7.7 8 2 11.1 7.16 12.12 7.06

M6 x 1 IUB IUC M6 1 7.62 9.52 8.99 8.64 8.86 9.22 2 12.7 8.43 13.72 8.15

M8 x 1.25 IUB IUC M8 1 8.51 11.91 11.15 9.53 10.95 11.38 2 14.27 10.31 15.29 10.19

8°F

D

Mounting Hole

-1 Length Code -2 Length Code

A A

C

E

C

After Knurl

ULTRASONIC / HEAT STAKING INSERTS

All dimensions are in inches.

All dimensions are in millimeters.

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Type Thread Hole Size in Material Thread

Stainless Code A E C S1 S2

Min. Hole Hole Dia.

Size Brass

Steel (1) ± .005 ± .009 ±.005 Nom. Nom.

Depth + .003

- .000 .086-56 IUTB IUTC 256 .157 .147 .121 .031 .031 .187 .127 (#2-56)

.112-40 IUTB IUTC 440 .226 .179 .152 .031 .031 .256 .158 (#4-40)

.138-32 IUTB IUTC 632 .281 .210 .183 .031 .031 .311 .189 (#6-32)

.164-32 IUTB IUTC 832 .321 .243 .217 .031 .040 .351 .223 (#8-32)

.190-24 IUTB IUTC 024 .375 .273 .247 .046 .046 .405 .253 (#10-24)

.190-32 IUTB IUTC 032 .375 .273 .247 .046 .046 .405 .253 (#10-32)

.250-20 IUTB IUTC 0420 .500 .342 .310 .046 .062 .530 .316 (1/4-20)

.250-28 IUTB IUTC 0428 .500 .342 .310 .046 .062 .530 .316 (1/4-28)

.375-16 IUTB IUTC 0616 .500 .509 .462 .046 .062 .530 .468 (3/8-16)

(1) Thread tapped thru, Class 3A/4h screw must pass with finger torque, but basic go gauge may stop at last thread.

Straight Wall, Thru-Threaded, Types IUTB™ and IUTC™

• Designedforuseinstraightholes.• Self-aligninglead-inofinsertprovidesforaccurate alignmentpriortoinstallation.

Thread Type Thread Hole Size in Material Size x Stainless Code A E C S1 S2 Min. Hole Hole Dia. Pitch Brass

Steel (1) ± 0.13 ± 0.23 ±0.13 Nom. Nom. Depth + 0.08

M2 x 0.4 IUTB IUTC M2 4 3.73 3.07 0.79 0.79 4.76 3.23

M2.5 x 0.45 IUTB IUTC M2.5 5.74 4.55 3.86 0.79 0.79 6.5 4.01

M3 x 0.5 IUTB IUTC M3 5.74 4.55 3.86 0.79 0.79 6.5 4.01

M3.5 x 0.6 IUTB IUTC M3.5 7.14 5.33 4.65 0.79 0.79 7.9 4.81

M4 x 0.7 IUTB IUTC M4 8.15 6.17 5.51 0.79 1.02 8.91 5.67

M5 x 0.8 IUTB IUTC M5 9.52 6.93 6.27 1.17 1.17 10.28 6.43

M6 x 1 IUTB IUTC M6 12.7 8.69 7.87 1.17 1.58 13.46 8.03

S2

S1

C

A EAfter Knurl

ULTRASONIC / HEAT STAKING INSERTS

All dimensions are in inches.

All dimensions are in millimeters.

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Type Thread Hole Size in Material Thread

Brass Stainless Code A E C Hole Hole Dia. Size Steel (1) ± .005 ± .005 ± .003 Depth +.003-.000

.086-56 IsB IsC 256 .157 .151 .122 .187 .126 (#2-56)

.112-40 IsB IsC 440 .226 .182 .153 .256 .157 (#4-40)

.138-32 IsB IsC 632 .281 .215 .184 .311 .188 (#6-32)

.164-32 IsB IsC 832 .321 .245 .217 .351 .221 (#8-32)

.190-32 IsB IsC 032 .375 .276 .248 .405 .252 (#10-32)

.250-20 IsB IsC 0420 .500 .338 .311 .530 .315 (1/4-20)

(1) Thread tapped thru, Class 3A/4h screw must pass with finger torque, but basic go gauge may stop at last thread.

Symmetrical, Thru-Threaded, Types ISB™ and ISC™

• Designedforuseinstraightortaperedholes.• Symmetricaldesigneliminatestheneedfororientation.

Thread Type Thread Hole Size in Material Size x

Brass Stainless Code A E C Hole Hole Dia. Pitch Steel (1) ± 0.13 ± 0.13 ± 0.08 Depth +0.08

M3 x 0.5 IsB IsC M3 5.74 4.62 3.88 6.5 3.99

M4 x 0.7 IsB IsC M4 8.15 6.22 5.51 8.92 5.62

M5 x 0.8 IsB IsC M5 9.52 7.01 6.3 10.29 6.4

M6 x 1 IsB IsC M6 12.7 8.58 7.9 13.46 8

C

A EAfter Knurl

ULTRASONIC / HEAT STAKING INSERTS

All dimensions are in inches.

All dimensions are in millimeters.

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Types IUTB, IUTC(1)

ABS Polycarbonate

Thread Pullout Torque-out Pullout Torque-out Code (lbs.) (in. lbs.) (lbs.) (in. lbs.)

256 90 6 112 8 440 165 14 245 16 632 268 25 295 31 832 328 36 385 52 032 385 54 565 80 0420 480 135 600 190

ABS Polycarbonate Thread Pullout Torque-out Pullout Torque-out Code (N) (N•m) (N) (N•m)

M2.5/M3 730 1.58 1080 1.81

M4 1450 4.07 1710 5.88

M5 1710 6.1 2510 9.04

M6 2130 15.26 2660 21.47

Types ISB and ISC(1)

ABS Polycarbonate

Thread Pullout Torque-out Pullout Torque-out Code (lbs.) (in. lbs.) (lbs.) (in. lbs.)

256 85.5 6.14 149.4 6.37 440 151.37 14.38 344.94 23.17 632 320.3 21.69 405.9 18.19 832 462.9 31.7 663.9 57.15 032 549.6 52.3 1015.4 71.79 0420 600.45 100.25 – –

ABS Polycarbonate Thread Pullout Torque-out Pullout Torque-out Code (N) (N•m) (N) (N•m)

M3 680 1.62 1550 2.6

M4 2080 3.58 2980 6.45

M5 2470 5.9 4560 8.11

M6 2700 11.1 – –

(1) The values reported are averages for ultrasonically inserted inserts when all installation specifications and procedures are followed. Variations in mounting hole size, sheet material and installation procedure will affect results. Performance testing of this product in your application is recommended. Samples can be provided for this purpose.

ABS Polycarbonate Thread Pullout Torque-out Pullout Torque-out Code (N) (N•m) (N) (N•m)

M2.5-1 334 0.3 400 0.7

M2.5-2 334 0.3 400 0.7

M3-1 356 0.5 712 0.8

M3-2 356 0.5 712 0.8

M3.5-1 645 1.7 734 2

M3.5-2 1223 1.7 2002 2.7

M4-1 912 2 1312 2.3

M4-2 1646 2.1 2869 2.3

M5-1 1201 5.1 1913 6.2

M5-2 2491 6.8 4048 9

M6-1 1664 7.3 2731 9.6

M6-2 3025 7.3 6294 12.2

Types IUB, IUBB, IUC, and IUCC(1)

ABS Polycarbonate Thread Pullout Torque-out Pullout Torque-out Code (lbs.) (in. lbs.) (lbs.) (in. lbs.)

080-1 75 3 90 3 256-1 75 3 90 6 256-2 75 3 90 6 440-1 80 4 160 7 440-2 80 4 160 7 632-1 145 15 165 18 632-2 275 15 450 24 832-1 205 18 295 20 832-2 370 19 645 20 024-1 270 45 430 55 024-2 560 60 910 80 032-1 270 45 430 55 032-2 560 60 910 80 0420-1 374 65 614 85 0420-2 680 65 1415 108

ULTRASONIC THREADED INSERTS PERFORMANCE DATA

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Type Length Code A ± .005/H Min. Minor Thread

Brass Stainless Thread E C S1 S2 Dia.

Size Steel Code 4 6 8 10 12 Nom. ± .005 Nom. Nom. Min./Max.

.086-56 IBB IBC 256 .156/.080 .219/.115 .250/.150 .312/.185 .344/.220 .156 .142 .03 .03 .067/.0737 (#2-56) .112-40 IBB IBC 440 .205/.110 .281/.160 .344/.210 .406/.260 .438/.310 .188 .171 .03 .03 .086/.0939 (#4-40) .138-32 IBB IBC 632 .250/.135 .344/.200 .406/.260 .469/.325 .531/.385 .219 .202 .03 .06 .105/.114 (#6-32) .164-32 IBB IBC 832 .250/.135 .344/.200 .406/.260 .469/.325 .531/.385 .250 .226 .05 .06 .131/.139 (#8-32) .190-24 IBB IBC 024 .356/.175 .438/.260 .531/.345 .625/.425 .716/.510 .281 .259 .05 .06 .146/.156 (#10-24) .190-32 IBB IBC 032 .281/.135 .438/.200 .531/.260 .469/.325 .531/.385 .281 .259 .05 .06 .157/.164 (#10-32) .250-20 IBB IBC 0420 .344/.200 .531/.315 .625/.415 .719/.515 .819/.615 .344 .321 .06 .09 .197/.207 (1/4-20) .313-18 IBB IBC 0518 .438/.235 .594/.345 .719/.460 .811/.570 .949/.680 .438 .404 .078 .094 .260/.265 (5/16-18) .375-16 IBB IBC 0616 .500/.265 .688/.390 .812/.515 .935/.640 1.00/.765 .500 .466 .094 .094 .309/.321 (3/8-16)

Blind Threaded, Types IBB™ and IBC™

• Blind-endprotectsthethreadsfromplasticintrusion.

NOTE:Manufacturingtechniquesmayleaveaslightprojectionamaximumof.025”/0.65mmbeyondthe“A”dimension.

Thread Type Length Code A ± 0.13/H Min. Minor Size x

Brass Stainless Thread E C S1 S2 Dia.

Pitch Steel Code 4 6 8 10 12 Nom. ± 0.13 Nom. Nom. Min./Max.

M2.5 x 0.45 IBB IBC M2.5 4.78/2.01 6.35/2.87 7.14/3.74 9.53/4.6 10.31/5.47 4.78 4.34 0.8 0.8 2.03/2.14

M3 x 0.5 IBB IBC M3 5.21/2.21 7.13/3.21 8.73/4.21 10.31/5.21 11.13/6.21 4.78 4.34 0.8 0.8 2.47/2.59

M3.5 x 0.6 IBB IBC M3.5 6.35/2.62 8.73/3.81 10.31/5.02 11.91/6.22 13.48/7.42 5.56 5.13 0.8 1.6 2.87/3.01

M4 x 0.7 IBB IBC M4 6.35/3.08 8.73/4.47 10.31/5.89 11.91/7.29 13.48/8.69 6.35 5.74 1.2 1.6 3.25/3.42

M5 x 0.8 IBB IBC M5 7.13/3.49 11.12/5.09 13.48/6.69 11.91/8.29 13.48/9.89 7.14 6.57 1.2 1.6 4.15/4.34

M6 x 1 IBB IBC M6 8.73/4.37 13.49/6.37 15.87/8.37 18.26/10.57 20.8/12.37 8.74 8.15 1.6 2.4 4.94/5.16

M8 x 1.25 IBB IBCNs M8 11.13/5.72 15.09/7.82 18.24/10.32 20.62/12.82 22.23/15.32 11.13 10.26 1.98 2.4 6.78/6.92

H

C

A

E

Stock Diameter(Before Knurl)

S2S1

MOLDED-IN THREADED INSERTS

All dimensions are in inches.

All dimensions are in millimeters.

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Type (1) First Cycle on Locking Thread Stainless Thread Length A E C S1 S2 Minor Dia. H Torque (in. lbs.) Size Steel

Code Code ± .005 Nom. ± .005 ± .005 ± .005 Min/Max Min. Min. Max.

.086-56 IBLC 256 8 .250 .156 .150 .03 .03 .067/.0737 .150 0.2 2.5 (#2-56)

.112-40 IBLC 440 8 .344 .188 .180 .03 .03 .086/.0939 .210 0.5 5 (#4-40)

.138-32 IBLC 632 8 .406 .219 .200 .03 .03 .105/.114 .260 1 10 (#6-32)

.164-32 IBLC 832 8 .406 .250 .235 .05 .06 .131/.139 .260 1.5 15 (#8-32)

.190-32 IBLC 032 8 .531 .281 .270 .05 .06 .157/.164 .260 2 18 (#10-32)

.250-20 IBLC 0420 8 .625 .344 .325 .06 .09 .197/.207 .415 4.5 30 (1/4-20)

(1) Minor diameter may be below minimum in deformed thread area.

Self-Locking, Blind Threaded, Type IBLC™

• Deformedthreadslockscrewinplacetoresistvibration.• Blind-endprotectsthethreadsfromplasticintrusion.

Thread Type (1) First Cycle on Locking Size x Stainless Thread Length A E C S1 S2

Minor Dia. H Torque (N•m) Pitch Steel

Code Code ± 0.13 Nom. ± 0.13 ± 0.13 ± 0.13 Min/Max Min. Min. Max.

M3 x 0.5 IBLC M3 8 8.73 4.78 4.57 0.8 0.8 2.48/2.59 4.21 0.06 0.6

M4 x 0.7 IBLC M4 8 10.31 6.35 5.97 1.2 1.6 3.26/3.42 5.89 0.16 1.6

M5 x 0.8 IBLC M5 8 13.48 7.14 6.86 1.2 1.6 4.15/4.34 6.69 0.23 2.1

M6 x 1 IBLC M6 8 15.87 8.73 8.26 1.6 2.4 4.95/5.15 8.37 0.37 3.2

MOLDED-IN THREADED INSERTS

All dimensions are in inches.

All dimensions are in millimeters.

HDeformed thread for self-locking feature

C

A E

S2

S1

Stock Diameter(Before Knurl)

NOTE:Manufacturingtechniquesmayleaveaslightprojectionamaximumof.025”/0.65mmbeyondthe“A”dimension.

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Type Thread Thread Stainless Code A E C S1 S2 Minor Dia.

Size Brass Steel (1) ± .005 Nom. ± .005 Nom. Nom. Min./Max.

.060-80 ITB ITC 080 .125 .109 .078 .03 .03 .0475/.051 (#0-80)

.086-56 ITB ITC 256 .125 .156 .142 .03 .03 .067/.0737 (#2-56)

.112-40 ITB ITC 440 .188 .188 .171 .03 .03 .086/.0939 (#4-40)

.138-32 ITB ITC 632 .219 .219 .202 .03 .06 .105/.114 (#6-32)

.164-32 ITB ITC 832 .250 .250 .226 .05 .06 .131/.139 (#8-32)

.190-24 ITB ITC 024 .281 .281 .259 .05 .06 .146/.156 (#10-24)

.190-32 ITB ITC 032 .281 .281 .259 .05 .06 .157/.164 (#10-32)

.250-20 ITB ITC 0420 .375 .344 .321 .06 .09 .197/.207 (1/4-20)

.250-28 ITB ITC 0428 .375 .344 .321 .06 .09 .212/.220 (1/4-28)

.313-18 ITB ITC 0518 .469 .437 .404 .08 .09 .260/.265 (5/16-18)

.375-16 ITB ITC 0616 .562 .500 .466 .09 .09 .309/.321 (3/8-16)

(1) Thread tapped thru, Class 3A/4h screw must pass with finger torque, but basic go gauge may stop at last thread.

Thru-Threaded, Types ITB™ and ITC™

• Pilotdiameterandundercutsallowplastictoflow intogroovesprovidinghighpulloutresistance.

Thread Type Thread Size x Stainless Code A E C S1 S2 Minor Dia.

Pitch Brass Steel (1) ± 0.13 Nom. ± 0.13 Nom. Nom. Min./Max.

M3 x 0.5 ITB ITC M3 4.77 4.77 4.34 0.78 0.78 2.47/2.59

M4 x 0.7 ITB ITC M4 6.35 6.35 5.74 1.16 1.57 3.25/3.42

M5 x 0.8 ITB ITC M5 7.13 7.13 6.57 1.16 1.57 4.15/4.34

M6 x 1 ITB ITC M6 9.53 8.74 8.15 1.57 2.38 4.94/5.16

M10 x 1.5 ITB ITC M10 14.27 12.7 11.84 2.38 2.38 8.55/8.67

S2

S1

A

C

E

Stock Diameter(Before Knurl)

MOLDED-IN THREADED INSERTS

All dimensions are in inches.

All dimensions are in millimeters.

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Thru-Threaded, Knurled, Types STKB™ and STKC™

• Uniformknurldiameterreducestheriskofsinkmarks.• Availableinvaryinglengthsforinjectionmoldingassemblies.

Type Thread Length Code “L” ± .005 Minor Thread

Brass Stainless Code in 32nds of an Inch E Dia.

Size Steel (1) .125 .187 .250 .312 .375 .500 .625 .750 Nom. Min./Max.

.086-56 sTKB sTKC 256 4 6 8 10 12 16 20 24 .156 .067/.0737 (#2-56) .112-40 sTKB sTKC 440 4 6 8 10 12 16 20 24 .188 .086/.0939 (#4-40) .138-32 sTKB sTKC 632 4 6 8 10 12 16 20 24 .219 .105/.114 (#6-32) .164-32 sTKB sTKC 832 4 6 8 10 12 16 20 24 .250 .131/.139 (#8-32) .190-32 sTKB sTKC 032 4 6 8 10 12 16 20 24 .281 .157/.164 (#10-32) .250-20 sTKB sTKC 0420 4 6 8 10 12 16 20 24 .375 .197/.207 (1/4-20) .313-18 sTKB sTKC 0518 4 6 8 10 12 16 20 24 .437 .260/.265 (5/16-18) .375-16 sTKB sTKC 0616 4 6 8 10 12 16 20 NA .500 .309/.321 (3/8-16)

Thread Type Thread Length Code “L” ± 0.13 Minor Size x

Brass Stainless Code in millimeters E Dia.

Pitch Steel (1) Nom. Min./Max.

M3 x 0.5 sTKB sTKC M3 3 4 6 8 10 12 15 18 4.74 2.47/2.59

M4 x 0.7 sTKB sTKC M4 3 4 6 8 10 12 15 18 6.35 3.25/3.42

M5 x 0.8 sTKB sTKC M5 3 4 6 8 10 12 15 18 7.13 4.15/4.34

L E

Stock Diameter(Before Knurl)

Configuration forSTKB/STKC-256-20 and -24

MOLDED-IN THREADED INSERTS

All dimensions are in inches.

All dimensions are in millimeters.

(1) Thread tapped thru, Class 3A/4h screw must pass with finger torque, but basic go gauge may stop at last thread.NA Not Available.

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Types IBB and IBC(1)

ABS Polycarbonate Thread Length Pullout Torque-out Pullout Torque-out Code Code (lbs.) (in. lbs.) (lbs.) (in. lbs.)

256 6 148 / 140 5.8 / 5.5 165 / 158 6.2 / 5.8 10 150 / 143 6 / 5.7 167 / 160 6.4 / 5.9 440 6 250 / 240 6.2 / 5.7 265 / 253 6.9 / 6.5 10 252 / 243 6.4 / 5.9 268 / 262 7 / 6.6 632 6 425 / 415 8.5 / 8 455 / 440 9.2 / 8.7 10 428 / 420 8.6 / 8.2 458 / 452 9.3 / 8.8 832 6 530 / 521 15 / 14.1 545 / 536 16.1 / 15.4 10 533 / 526 15.8 / 15 547 / 540 16.4 / 15.8 032 6 635 / 624 57 / 52 648 / 640 59 / 56 10 637 / 629 58 / 54 651 / 646 60 / 57 0420 6 910 / 895 108 / 103 928 / 912 111 / 107

Types IBLC(1)

ABS Polycarbonate

Thread Pullout Torque-out Pullout Torque-out Code (lbs.) (in. lbs.) (lbs.) (in. lbs.)

256 128 / 118 5 / 4.6 142 / 134 5.8 / 5 440 230 / 220 6 / 5.5 238 / 226 6.8 / 6.2 632 392 / 378 7.8 / 7 406 / 390 9 / 8.2 832 496 / 480 11 / 9 500 / 468 14 / 13 032 592 / 580 40 / 30 592 / 564 48 / 42 0420 760 / 738 90 / 78 798 / 780 99 / 84

ABS Polycarbonate

Thread Pullout Torque-out Pullout Torque-out Code (N) (N•m) (N) (N•m)

M3 1020 / 970 0.67 / 0.62 1050 / 1000 0.76 / 0.7 M4 2200 / 2130 1.24 / 1.01 2220 / 2080 1.58 / 1.46 M5 2630 / 2570 4.52 / 3.39 2630 / 2500 5.42 / 4.74 M6 3380 / 3280 10.1 / 8.81 3540 / 3460 11.1 / 9.49

ABS Polycarbonate

Thread Pullout Torque-out Pullout Torque-out Code (N) (N•m) (N) (N•m)

M3 770 / 730 0.67 / 0.62 820 / 760 0.77 / 0.7 M4 1640 / 1630 1.58 / 1.53 1690 / 1650 1.8 / 1.66 M5 1970 / 1920 6.22 / 5.65 2010 / 1970 6.44 / 5.87 M6 2820 / 2750 8.47 / 7.91 2890 / 2820 11.6 / 11

Types ITB and ITC(1)

ABS Polycarbonate

Thread Pullout Torque-out Pullout Torque-out Code (lbs.) (in. lbs.) (lbs.) (in. lbs.)

080/256 104 / 96 5.6 / 5.2 115 / 106 6 / 5.6 440 175 / 166 6 / 5.5 186 / 173 6.9 / 6.2 632 298 / 290 8 / 7.5 318 / 302 9 / 8.5 832 370 / 368 14 / 13.6 382 / 372 16 / 14.7 032 444 / 432 55 / 50 454 / 445 57 / 52 0420/0428 635 / 620 75 / 70 650 / 635 103 / 98

(1) The values reported are high and low ranges when all installation specifications and procedures are followed. Variations in mounting hole size, workpiece material and installation procedure will affect results. Performance testing of this product in your application is recommended. Samples can be provided for this purpose.

ABS Polycarbonate Thread Length Pullout Torque-out Pullout Torque-out Code Code (N) (N•m) (N) (N•m)

M2.5/M3 6 1110 / 1060 0.7 / 0.64 1170 / 1120 0.77 / 0.73 10 1120 / 1080 0.72 / 0.66 1190 / 1160 0.79 / 0.74 M4 6 2350 / 2310 1.69 / 1.59 2420 / 2380 1.81 / 1.74 10 2370 / 2330 1.78 / 1.69 2430 / 2400 1.85 / 1.79 M5 6 2820 / 2770 6.44 / 5.87 2880 / 2840 6.66 / 6.32 10 2830 / 2790 6.55 / 6.1 2890 / 2870 6.78 / 6.44 M6 6 4040 / 3980 12.2 / 11.6 4120 / 4050 12.5 / 12

MOLDED-IN THREADED INSERTS PERFORMANCE DATA

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Hexagonal, Types NFPA™ and NFPC™

• Press-fitinsertprovidesstrong,reusablethreads.Noheatorultrasonicsrequired.

• Hexagonal“barbed”configurationensureshightorque-outandpulloutvalues.

Type Min. Hole Size Min. Min. Depth Thread Stainless Thread A Sheet in Sheet C E Boss Full Thread Size Steel

Aluminum Code Max. Thickness + .003 - .000 Max. Nom. Dia. H(1)

.086-56 NFPC NFPA 256 .230 .240 .187 .186 .187 .500 .212 (#2-56)

.112-40 NFPC NFPA 440 .230 .240 .187 .186 .187 .500 .212 (#4-40)

.138-32 NFPC NFPA 632 .230 .240 .187 .186 .187 .500 .212 (#6-32)

.164-32 NFPC NFPA 832 .265 .275 .250 .249 .250 .625 .248 (#8-32)

.190-24 NFPC NFPA 024 .265 .275 .250 .249 .250 .625 .248 (#10-24)

.190-32 NFPC NFPA 032 .265 .275 .250 .249 .250 .625 .248 (#10-32)

.250-20 NFPC NFPA 0420 .315 .328 .312 .311 .312 .750 .300 (1/4-20)

.313-18 NFPC NFPA 0518 .365 .380 .375 .374 .375 .950 .345 (5/16-18)

Thread Type Min. Hole Size Min. Min. Depth Size x Stainless Thread A Sheet in Sheet C E Boss Full Thread Pitch Steel

Aluminum Code Max. Thickness + 0.08 Max. Nom. Dia. H(1)

M3 x 0.5 NFPC NFPA M3 5.84 6.1 4.75 4.72 4.75 12.7 5.38

M3.5 x 0.6 NFPC NFPA M3.5 5.84 6.1 4.75 4.72 4.75 12.7 5.38

M4 x 0.7 NFPC NFPA M4 6.73 6.99 6.35 6.32 6.35 15.88 6.3

M5 x 0.8 NFPC NFPA M5 6.73 6.99 6.35 6.32 6.35 15.88 6.3

M6 x 1 NFPC NFPA M6 8 8.33 7.92 7.89 7.92 19.05 7.62

M8 x 1.25 NFPC NFPA M8 9.27 9.65 9.53 9.50 9.53 24.13 8.76

(1) Thread tapped thru, Class 3A/4h screw must pass with finger torque, but basic go gauge may stop at pilot end.

H

C

PilotEnd

A E

PRESS-IN THREADED INSERTS

All dimensions are in inches.

All dimensions are in millimeters.

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Thru-Threaded, Type PPB™

• Press-fitinsertwithstrong,reusablethreads. Noheatorultrasonicsrequired.• Slottedinsertcompressesallowingeasyaccessinto themountinghole.

Type E Hole Size in Material Thread Thread Length A Nom.

B S W Min. Hole Hole Dia. Size Brass Code Code ± .005 ± .015 Nom. ± .015 Depth ± .002 .086-56 PPB 256 1 .156 .125 .040 .115 .020 .196 .125 (#2-56)

.112-40 PPB 440 1 .188 .156 .045 .140 .020 .228 .156 (#4-40) 2 .250 .060 .190 .290

.138-32 PPB 632 1 .250 .188 .060 .190 .031 .290 .188 (#6-32) 2 .313 .075 .235 .353

.164-32 PPB 832 1 .250 .219 .060 .190 .047 .290 .219 (#8-32) 2 .313 .075 .235 .353

.190-32 PPB 032 1 .313 .250 .075 .235 .062 .353 .250 (#10-32) 2 .375 .090 .280 .415

.250-20 PPB 0420 1 .438 .313 .105 .330 .078 .478 .313 (1/4-20) 2 .500 .120 .375 .540

Thread Type E Hole Size in Material Size x Thread Length A Nom.

B S W Min. Hole Hole Dia. Pitch Brass Code Code ± 0.13 ± 0.4 Nom. ± 0.4 Depth ± 0.05

M3 x 0.5 PPB M3 1 4.77 3.96 1.14 3.56 0.5 5.79 3.96 2 6.35 1.52 4.83 7.37

M4 x 0.7 PPB M4 1 6.35 5.56 1.52 4.83 1.2 7.37 5.56 2 7.95 1.91 5.97 8.97

M5 x 0.8 PPB M5 1 7.95 6.35 1.91 5.97 1.6 8.97 6.35 2 9.52 2.29 7.11 10.54

M6 x 1 PPB M6 1 11.12 7.95 2.67 8.38 2 12.14 7.95 2 12.7 3.05 9.53 13.72

S20° Chamfer

Stock Diameter(Before Knurl)

W

A EB

PRESS-IN THREADED INSERTS

All dimensions are in inches.

All dimensions are in millimeters.

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Type Hole Size in Material Thread Thread Length A E C T B S W Min. Hole Hole Dia. Size Brass Code Code ± .005 Nom. Nom. ± .005 ± .010 Nom. ± .015 Depth ± .002

.086-56 PFLB 256 1 .136 .188 .135 .020 .025 .115 .020 .176 .125 (#2-56)

.112-40 PFLB 440 1 .166

.219 .166 .022 .027 .140

.020 .206

.156 (#4-40) 2 .228 .190 .268

.138-32 PFLB 632 1 .222

.250 .200 .028 .033 .190

.031 .262

.188 (#6-32) 2 .253 .210 .293

.164-32 PFLB 832 1 .246

.281 .230 .035 .040 .210

.047 .286

.219 (#8-32) 2 .278 .235 .318

.190-32 PFLB 032 1 .270

.313 .262 .043 .048 .235

.062 .310

.250 (#10-32) 2 .332 .280 .372

.250-20 PFLB 0420 1 .388

.375 .335 .050 .055 .330

.078 .428

.313 (1/4-20) 2 .450 .375 .490

Flange-Head, Type PFLB™

• Press-fitinsertwithstrong,reusablethreads.Noheator ultrasonicsrequired.• Flange-headeliminatesdirectcontactofplasticwith matingparts.• Slottedinsertcompressesallowingeasyaccessintothe mountinghole

Thread Type Hole Size in Material Size x Thread Length A E C T B S W Min. Hole Hole Dia. Pitch Brass Code Code ± 0.13 Nom. Nom. ± 0.13 ± 0.25 Nom. ± 0.4 Depth ± 0.05

M3 x 0.5 PFLB M3 1 4.22 5.56 4.22 0.56 0.69 3.56 0.5 5.24 3.96 2 5.8 4.83 6.82

M4 x 0.7 PFLB M4 1 6.25 7.14 5.84 0.89 1.02 5.33 1.14 7.27 5.56 2 7.06 5.97 8.08

M5 x 0.8 PFLB M5 1 6.86 7.95 6.65 1.09 1.22 5.97 1.6 7.88 6.35 2 8.43 7.11 9.45

M6 x 1 PFLB M6 1 9.86 9.53 8.51 1.27 1.40 8.38 2 10.88 7.95 2 11.43 9.53 12.45

PRESS-IN THREADED INSERTS

All dimensions are in inches.

All dimensions are in millimeters.

T B

W

A

S

E

*C Diameter (After Knurl)

C*

20° Chamfer

Sheet

When flange head of the insert contacts the sheet, insert is fully installed.

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Type Hole Size in Material Thread Thread A E C B1 B2 S W Min. Hole Hole Dia. Size Brass Code ± .005 Nom. ± .010 ± .010 ± .010 Nom. ± .015 Depth ± .002 .086-56 PKB 256 .125 .125 .110 .037 .053 .095 .020 .165 .125 (#2-56)

.112-40 PKB 440 .188 .156 .137 .056 .079 .140 .020 .228 .156 (#4-40)

.138-32 PKB 632 .250 .188 .165 .075 .105 .190 .031 .290 .188 (#6-32)

.164-32 PKB 832 .312 .219 .196 .094 .131 .235 .047 .352 .219 (#8-32)

.190-32 PKB 032 .375 .250 .234 .112 .158 .280 .062 .415 .250 (#10-32)

.250-20 PKB 0420 .500 .312 .291 .150 .210 .375 .078 .540 .312 (1/4-20)

All dimensions are in inches.

Thread Type Hole Size in Material Size x Thread A E C B1 B2 S W Min. Hole Hole Dia. Pitch Brass Code ± 0.13 Nom. ± 0.25 ± 0.25 ± 0.25 Nom. ± 0.4 Depth ± 0.05

M3 x 0.5 PKB M3 4.78 3.96 3.48 1.42 2.01 3.56 0.5 5.8 3.96

M4 x 0.7 PKB M4 7.92 5.56 4.98 2.39 3.33 5.97 1.19 8.94 5.56

M5 x 0.8 PKB M5 9.53 6.35 5.94 2.84 4.01 7.11 1.57 10.55 6.35

M6 x 1 PKB M6 12.7 7.92 7.39 3.81 5.33 9.53 1.98 13.72 7.92

All dimensions are in millimeters.

A

C

E

S

B1 B2

W

20° Chamfer

Stock Diameter(Before Knurl)

Straight Knurl, Type PKB™

• Press-fitinsertwithstrong,reusablethreads. Noheatorultrasonicsrequired.• Straightknurlingatthetopendoftheinsertoffers highertorsionalresistance.• Slottedinsertcompressesallowingeasyaccessinto themountinghole.

PRESS-IN THREADED INSERTS

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Types NFPA and NFPC(1)

ABS Polycarbonate Thread Install. Pullout Torque-out

Install. Pullout Torque-out Code Force (lbs.) (in. lbs.)

Force (lbs.) (in. lbs.) (lbs.) (lbs.)

440 225 125 4 600 280 16 632 225 125 4 600 280 16 832 300 135 10 600 380 42 032 300 135 10 600 380 42 0420 400 235 28 – – –

(1) The values reported are averages when all installation specifications and procedures are followed. Variations in mounting hole size, work piece material and installation procedure will affect results. Performance testing of this product in your application is recommended. Samples can be provided for this purpose.

ABS Polycarbonate Thread Install. Pullout Torque-out

Install. Pullout Torque-out Code Force (N) (N • m)

Force (N) (N • m) (kN) (kN)

M3 1 556 0.45 2.67 1245 1.8 M4 1.33 600 1.13 2.67 1690 4.74 M5 1.33 600 1.13 2.67 1690 4.74 M6 1.78 1045 3.16 – – –

Type PPB(1)

Phenolic Polycarbonate Thread Length Pullout Torque-out Pullout Torque-out Code Code (lbs.) (in. lbs.) (lbs.) (in. lbs.)

256 1 60 12.8 52 7.2 440 1 81 20.8 74 15.3 2 193 38.6 170 25.2 632 1 104 29.2 94 23.4 2 221 49.6 198 35.6 832 1 126 36.8 116 31.6 2 249 59.8 224 45.6 032 1 147 45.0 138 39.6 2 276 69.6 253 55.6 0420 1 192 61.6 182 56.0 2 334 91.2 308 76.6

Phenolic Polycarbonate Thread Length Pullout Torque-out Pullout Torque-out Code Code (N) (N • m) (N) (N • m)

M3 1 360 2.35 330 1.73 2 860 4.36 760 2.85 M4 1 560 4.16 520 3.57 2 1110 6.76 1000 5.15 M5 1 650 5.09 610 4.47 2 1230 7.86 1130 6.28 M6 1 850 6.96 810 6.33 2 1490 10.31 1370 8.66

Type PFLB(1)

Phenolic Polycarbonate Thread Length Pullout Torque-out Pullout Torque-out Code Code (lbs.) (in. lbs.) (lbs.) (in. lbs.)

256 1 28 8.0 17 8.0 440 1 40 14.7 28 14.7 2 64 14.7 44 14.7 632 1 53 22.0 41 22.0 2 77 22.0 56 22.0 832 1 64 28.8 53 28.8 2 72 28.8 68 28.8 032 1 76 35.6 65 35.6 2 100 35.6 80 35.6 0420 1 100 49.8 89 49.8 2 125 49.8 104 49.8

Type PKB(1)

Phenolic Polycarbonate Thread Pullout Torque-out Pullout Torque-out Code (lbs.) (in. lbs.) (lbs.) (in. lbs.)

256 22 13.2 11 5.2

440 42 22.2 32 14.4

632 64 32.6 53 24.6

832 84 42.0 73 33.8

032 106 51.2 94 43.0

0420 149 71.0 136 62.0

Phenolic Polycarbonate Thread Length Pullout Torque-out Pullout Torque-out Code Code (N) (N • m) (N) (N • m)

M3 1 180 1.66 130 1.66 2 280 1.66 200 1.66 M4 1 280 3.25 240 3.25 2 320 3.25 300 3.25 M5 1 340 4.02 290 4.02 2 450 4.02 360 4.02 M6 1 450 5.63 400 5.63 2 560 5.63 460 5.63

Phenolic Polycarbonate Thread Pullout Torque-out Pullout Torque-out Code (N) (N • m) (N) (N • m)

M3 190 2.51 140 1.63

M4 370 4.75 320 3.82

M5 470 5.79 420 4.86

M6 660 8.02 610 7.01

PRESS-IN THREADED INSERTS PERFORMANCE DATA

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SI-18 PennEngineering • www.pemnet.com

Ifyoucannotfindastandardproductinthiscatalogtomeetyourrequirements,ourApplicationEngineeringDepartmentwillassistyoutodesignacustomfastenertosatisfyyourrequirements.Belowareafewexamplesofcustominsertdesigns.

SNAP-TOP® ULTRASONIC INSERTS

DesignedforultrasonicinstallationallowingaspringactiontoholdaPCboardsecurelywithoutscrewsorotherthreadedhardware.SIultrasonicSNAP-TOP®insertsareavailableinlengthsfrom1/4”to1”/6.35to25.4mmspacing.Theseinsertscanbeprovidedinaluminum,brass,andstainlesssteelandaredesignedforultrasonicinstallationintocoredordrilledholes.

THIN SHEET STUDS

Provideexternalthreadsinmaterialasthinas.125”/3.175mm.SIstudsareavailableinlengthsfrom1/4”to3/4”/6.35to19.05mminthreadsizes#4-40to1/4-20/M3toM6.Theseinsertscanbeprovidedinaluminum,brass,steelandstainlesssteelandcanbepressedintopre-moldedordrilledholes.

ULTRASONIC STUDS

Taperedbodyprovideseasyinsertioninpre-moldedordrilledholes.Theyareavailableinlengthsfrom1/4”to3/4”/6.35to19.05mminthreadsizes#2-56to1/4-20/M2toM6.Theseinsertscanbeprovidedinaluminum,brass,steelandstainlesssteel.

SELF-LOCKING ULTRASONIC INSERTS

Theself-lockingfeaturepreventsscrewlooseningandisadvantageousinapplicationswherevibrationispresent.Theyareavailableinthreadsizes#2-56to1/4-20/M2toM6andaredesignedforultrasonicinstallationintostraightortaperedholes.

THERMOPLASTIC INSERTS

Allowsformountingacomponentontheexternalthread.Theyareavailableinlengthsfrom3/16”to1”/4.76to25.4mm.Threadsizes#4-40to1/4-20/M3toM6.SIthermoplasticinsertscanbeprovidedinaluminum,brass,steelandstainlesssteelandcanbepressedintopre-moldedordrilledholes.

CUSTOM DESIGNS FOR SPECIAL APPLICATIONS

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Asageneralrule,thewallthicknessshouldbe1/2to1timestheinsertoutsidediameter.Iftheinsertapplicationisinacircularboss,thebossdiametershouldbe2timestheinsertdiameter.Thinnerwallsandbossesmaybeusedbutwillaffectperformance.

Boss Dia.2 x insert dia.

InsertDia. Wall Thickness

HOLE PREPARATION GUIDELINES

Pulloutistheforcerequiredtopulltheinsertfromthesheet.

Torque-out is the torque required to turn thefastener in the parent material after installationwithoutinducingclamploadonthefastener.

PULLOUT TORQUE OUT

Page 45: Studs and Standoffs

SI-20

TheSIprototypekitcontainsawidevarietyofSIthreadedinsertsforplasticsforyourprototypeneeds.Thekitcontainsover1,000ultrasonic,molded-in,andpress-ininsertsofvarioustypesandsizes,soyoucanchoosetheonewhichwillbestsuityourspecificdesignrequirements.Thekitcontainsbothunifiedandmetricparts.

PEMPart#PKSI-100.Price-US$50.00(Subjecttochangewithoutnotice).

All specifications in this bulletin are presented as accurately and up-to-date as possible. We reserve the right to make changes to any information contained in this bulletin without notice.

We recommended that you test a particular product to be sure it is ideally suited to your application. We will be happy to provide samples for this purpose and our authorized distributors can also help you with your selection.

SI® PROTOTYPE KIT

Specifications subject to change without notice. See our website for the most current version of this bulletin.

RoHS compliance information can be found on our website.© 2012 PennEngineering.

Technical support e-mail: [email protected]