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(1)

BPBumper Standoffs

APPLICATION GUIDE

Page 2 Page 4 Page 6 Page 8

Concerned about damaging sensitive components during assembly? PENCOM’s Bumper Standoffs create a non-conduc- tive boundary of protection exactly where you want it. They’re available in RoHS-compliant materials and finishes and a variety of installation styles as shown below.

BPCSelf-clinching

BPFFemale Thread

BPMMale Thread

BPSSwage-in

REV CHANGE DATE

01/10/12

CHKDRN

GSA2

2

Drawn


02/08/12 GSB Standoff tips corrected

BPCSelf-clinching

BPFFemale Thread

BPMMale Thread

BPSSwage-in

REV CHANGE DATE

01/10/12

CHKDRN

GSA2

2

Drawn



BPCSelf-clinching

BPFFemale Thread

BPMMale Thread

BPSSwage-in

REV CHANGE DATE

01/10/12

CHKDRN

GSA2

2

Drawn



BPCSelf-clinching

BPFFemale Thread

BPMMale Thread

BPSSwage-in

REV CHANGE DATE

01/10/12

CHKDRN

GSA2

2

Drawn



BPCSelf-clinching

BPFFemale Thread

BPMMale Thread

BPSSwage-in

REV CHANGE DATE

01/10/12

CHKDRN

GSA2

2

Drawn



®

BP

Bum

per Standoffs

®

Page 2 Page 4 Page 8 1

Type StyleInstallation Sheet Material

Installs Close to EdgeAluminum

CarbonSteel

StainlessSteel

PCB

BPC Self-clinching • • •

BPF Female Thread • • • •

BPM Male Thread • • • •

BPS Swage-in • • • •

(1) See page 3 for BPC edge distance requirements.

PF-BP 07/30/13 © PENCOM 2013

®

(2)

FEATUrES

• Self-clinching design provides quick and permanent installation in .040” (1.02mm) min. thick aluminum, cold-rolled steel and stainless steel sheets.

• Flush appearance on the back side of sheet surface.

• Custom lengths available by request.

INC

H

L(Length)±.010

1.000

1.125

1.250

1.375

1.500

1.625

1.750

1.875

2.000

ME

TrIC

L(Length)±0.25

26

29

32

35

38

41

44

47

50

All dimensions in inches All dimensions in millimeters

LENGTH

BPC Self-clinching Bumper Standoffs provide a permanent and reliable installation that creates a flush appearance on the back side of aluminum, carbon steel and stainless steel sheets.

PArT DESCrIPTION ExAMPLE

BPC — 1.500 — STL — Z

Length Body Material

Code

Body Finish Code

BP

C S

elf-clinching Bum

per Standoffs

®

BPCSelf-clinching Bumper Standoffs®

REV CHANGE DATE

12/28/11Drawn

CHKDRN

GSA

.25 (6.4)

Dimensions without tolerances are referenceDimensions in inches (millimeters)

.31 (7.9)

.24/.22(6.1/5.6)

.249 (6.32)Max.

L

BPC General

3.5

1.75

03/23/12Added "Dimensions in inches (millimeters)"

§ Indicates change from previous revision

GSB

PF-BP 07/30/13 © PENCOM 2013

®

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TIP MATErIAL AND COLOr: Nylon UL94-V0 / White

INSTALLATION

1. Punch or drill hole in .040in (1.02mm) minimum thick sheet a distance of .33in (8.4mm) minimum from hole center to edge. Do not deburr hole edges.

2. Insert standoff through hole in sheet and into the anvil as shown.

3. Squeeze the sheet and standoff head between parallel punch and anvil sur- faces. Use only enough pressure to seat the standoff head flush with the sheet. Punch and anvil may be ordered using PENCOM part numbers TL1287 and TL1288, respectively, or made from hardened tool steel.

BODy MATErIAL AND FINISH

PErFOrMANCE

Body Material

Code

Test Sheet Material

5052-H32 Aluminum 1008 Carbon Steel HrB 60 304 Stainless Steel HrB 70

Installation lbs

(kN)

Push–out lbs (N)

Installation lbs

(kN)

Push–out lbs (N)

Installation lbs

(kN)

Push–out lbs (N)

STL2500-3000(11.1-13.3)

240 (1060)

5100-6100(22.7-27.1)

360(1600)

(2) (2)

SS2500-3000(11.1-13.3)

240 (1060)

5100-6100(22.7-27.1)

360(1600)

(2) (2)

S4 — — — —7200-8800(32.0-39.1)

360(1600)

Punch

4

3L Min.

Sheet

.253/.250(6.43/6.35)

Sheet Hole Detail

.256/.253(6.50/6.43)

Anvil

Installed

BPC Installation

REV CHANGE DATE

12/28/11Drawn

CHKDRN

GSA

03/23/12Added "Dimensions in inches (millimeters)"

§ Indicates change from previous revision

GSB

Dimensions in inches (millimeters)

Body Material

CodeBody Material Description

Body Finish Code

Body Finish Description

For Use in Sheet Hardness

HrB 70 Max.

HrB 80 Max.

HrB 88 Max.

STL Heat Treated Carbon Steel Z Zinc (SC1) with Type III Clear Chromate per ASTM B 633 •

SS 300-Series Stainless Steel P Passivated and/or Tested per ASTM A 967 •

S4 Heat Treated Stainless Steel P Passivated and/or Tested per ASTM A 967 •

(1) Custom materials and finishes available by request.

(1) Performance data represents the average destructive result when all installation specifications are strictly followed. Variations in sheet hole size, thickness, material and installation method will affect the loads. PENCOM strongly encourages testing in the application. (2) Not recommended.

BP

C S

elf-clinching Bum

per Standoffs

®

PF-BP 07/30/13 © PENCOM 2013

®

(4)

FEATUrES

• Female thread allows simple installation using screw and washer without special tools. • Installs close to sheet edge without creating any hoop stress in sheet.

PENCOM carries a broad selection of screw and washer assemblies and com-ponents. See page 6 for more information.


BPF — 440 — 1.500 — STL — Z

Thread Code*


Code

Body Finish Code

INC

H

L(Length)±.010

1.000

1.125

1.250

1.375

1.500

1.625

1.750

1.875

2.000

ME

TrIC

L(Length)±0.25

26

29

32

35

38

41

44

47

50

LENGTH

*For 4-40 UNC-2A thread use thread code 440, for M3 x 0.5 6g thread use thread code M3

BP

F Female Thread B

umper S

tandoffs®

BPFFemale Thread Bumper Standoffs®

REV CHANGE DATE

12/28/11Drawn

CHKDRN

GSA

.24/.22(6.1/5.6)

.25 (6.4)


.25 (6.4)

L

.250(6.35)Min.

3.5

1.75

BPF General

BPF Installation

2

2

02/08/12Revised dimension location GSB

03/23/12Added "Dimensions in inches (millimeters)" GSC

PF-BP 07/30/13 © PENCOM 2013


®

(5)

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Body Material


Body Finish Code


STL Carbon Steel Z Zinc SC1 with Type III Clear Chromate per ASTM B 633

SS 300-Series Stainless Steel P Passivated and/or Tested per ASTM A 967

(1) Custom materials and finishes available by request

INSTALLATION

1. Punch or drill hole in sheet. Insert a male threaded fastener through hole in the sheet and secure the standoff. In some applications it may be desirable to install a washer between the head of the male threaded fastener and sheet.

2. Tighten the assembly by torquing the male threaded fastener 4.0 to 5.5 in-lbs (4-40) or 0.51 to 0.69 N-m (M3). PENCOM recommends a minimum thread en- gagement of .112in (4-40) or 3.0mm (M3) between the male and female threads. Installation torques are for zinc-plated Grade 2 (inch) or Class 4.8 (metric) carbon steel screws and for reference only. The majority of joint tightening torque is used to overcome friction under the rotating member face. Many factors can affect the amount of resulting friction such as rotating member surface area and finish, and sheet hole size and finish. PENCOM recommends testing in the application.

3. Due to the inelastic nature and unpredictable friction coefficients of stainless steel, torque calculations can be unreliable and specifications should be determined through testing.

4. One method of determining the installation torque uses 50% of the failure torque as developed through testing in the appliation and applying a ±20% tolerance.

REV CHANGE DATE

12/28/11Drawn

CHKDRN

GSA

.24/.22(6.1/5.6)

.25 (6.4)

(Dimensions without tolerances are reference)

.25 (6.4)

L

.250(6.35)Min.

3.5

1.75

BPF General

BPF Installation

2

2

02/08/12Revised dimension location GSB

BP

F Female Thread B

umper S

tandoffs®


PF-BP 07/30/13 © PENCOM 2013

®

DriveStyle Code

Description

PH#1

Cross-recess

SL-PHSlotted #1

Cross-recess

TXT-10

Six-lobe

SL-TXSlotted

T-10 Six-lobe

(6)

BP

F Female Thread B

umper S

tandoffs®

www.pencomsf.com

SCrEw / wASHEr OPTIONS Follow the examples below to build part descriptions for common screw styles supplied by PENCOM. For the associated part numbers speak with an Account Manager or visit www.pencomsf.com for more screw options. Washer components can be found on page 10 of this bulletin.

(1) Use 4-40 for 4-40 UNC-2A thread (2) Screw dimensions per ASME B18.6.7M. Other metric standards available.

M3 X 10 PH — PN — MS — STL — Z — IFI

LengthThread¹ Head Style Code

DriveStyle Code

FinishCode

MaterialCode

MetricStandard²

INC

H

L(Length)±.010

3/16

1/4

5/16

3/8

7/16

1/2

9/16

5/8

3/4

7/8

1

1-1/4

1-1/2

1-3/4

2

ME

TrIC

L(Length)±0.25

3

4

5

6

8

10

12

14

16

18

20

22

25

30

35

LENGTH

MaterialCode

Description

STL Carbon Steel

SS Stainless Steel

FinishCode

Description

Z Zinc with Clear Chromate

HeadStyle Code

Description

PN Pan

FL Flat

REV CHANGE DATE

04/11/12Drawn

CHKDRN

AREV CHANGE DATE

04/11/12Drawn

CHKDRN

AREV CHANGE DATE

04/11/12Drawn

CHKDRN

AREV CHANGE DATE

04/11/12Drawn

CHKDRN

A

REV CHANGE DATE

04/11/12Drawn

CHKDRN

AREV CHANGE DATE

04/11/12Drawn

CHKDRN

AREV CHANGE DATE

04/11/12Drawn

CHKDRN

AREV CHANGE DATE

04/11/12Drawn

CHKDRN

A

REV CHANGE DATE

04/11/12Drawn

CHKDRN

A

REV CHANGE DATE

04/11/12Drawn

CHKDRN

A

REV CHANGE DATE

04/11/12Drawn

CHKDRN

A

REV CHANGE DATE

04/11/12Drawn

CHKDRN

A

Not all combinations are available. Contact a PENCOM Account Manager or visit www.pencomsf.com.

PF-BP 07/30/13 © PENCOM 2013

®

(7)

BP

F Female Thread B

umper S

tandoffs®

www.pencomsf.com

SCrEw / wASHEr OPTIONS (CONTINUED)Screw and washer assemblies (SEMS) prevent missing or lost washers and reduce assembly times. The examples below shows the additional codes necessary to modify an M3 screw description (4-40 modification similar).

SEMS washerType

Part Description

External Tooth

M3X10 PH-PN-ExT-SEMS-MS-STL-Z-IFI

InternalTooth

M3X10 PH-PN-INT-SEMS-MS-STL-Z-IFI

Split Lock

M3X10 PH-PN-SPLT-LK-SEMS-MS-STL-Z-IFI

Square-coneSEMS

M3X10 PH-PN-SQCN-SEMS-MS-STL-Z-IFI

Add a nylon patch to the threads to resist loosening. See page 9 of this bulletin for more information.

Ex. M3X10 PH-PN-MS-STL-Z-PATCH

PF-BP 07/30/13 © PENCOM 2013

®

(8)

FEATUrES

• Male thread allows simple installation using nut and washer without special tools. • Installs close to sheet edge without creating any hoop stress in sheet.

PENCOM carries a wide assortment of standard and self-clinching nut and washer assemblies and components (self-clinching nut shown). See page 10 for more information.


BPM — 440 — 1.500 — STL — Z

Thread Code*


Code

Body Finish Code

INC

H

L(Length)±.010

1.000

1.125

1.250

1.375

1.500

1.625

1.750

1.875

2.000

ME

TrIC

L(Length)±0.25

26

29

32

35

38

41

44

47

50


LENGTH

*For 4-40 UNC-2B thread use thread code 440, for M3 x 0.5 6H thread use thread code M3

BPMMale Thread Bumper Standoffs®

BP

M M

ale Thread Bum

per Standoffs

®

REV CHANGE DATE

12/28/11Drawn

CHKDRN

GSA

.24/.22(6.1/5.6)


.25 (6.4)

.255/.245(6.48/6.22)

.25 (6.4)

L

3.5

1.75

BPM Installation

2

2

BPM General

02/08/12Tips redrawn GSB


PF-BP 07/30/13 © PENCOM 2013

®

(9)

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Body Material


Body Finish Code


STL Carbon Steel Z Zinc (SC1) with Type III Clear Chromate per ASTM B 633



INSTALLATION

1. Punch or drill hole in sheet. Insert the standoff male thread through hole in sheet and secure with a female threaded fastener. In some applications it may be desirable to install a washer between the female threaded fastener and sheet.

2. Tighten the assembly by torquing the female threaded fastener 3.2 to 4.3 in-lbs (4-40) or 0.32 to 0.43 N-m (M3). PENCOM recommends a minimum thread engage- ment of .112in (4-40) or 3.0mm (M3) between the male and female threads. Installation torques are for zinc-plated carbon steel standoffs and for reference only. The majority of joint tightening torque is used to overcome friction under the rotating member face. Many factors can affect the amount of resulting friction such as rotating member surface area and finish, and sheet hole size and finish. PENCOM recommends testing in the application.

3. Due to the inelastic nature and unpredictable friction coefficients of stainless steel, torque calculations for this material can be unreliable. One method of determining the installation torque uses 50% of the failure torque as developed through testing in the application and applying a ±20% tolerance.

4. One method of determining the installation torque uses 50% of the failure torque as developed through testing in the appliation and applying a ±20% tolerance.


REV CHANGE DATE

12/28/11Drawn

CHKDRN

GSA

.24/.22(6.1/5.6)

(Dimensions without tolerances are reference)

.25 (6.4)

.255/.245(6.48/6.22)

.25 (6.4)

L

3.5

1.75

BPM Installation

2

2

BPM General

02/08/12Tips redrawn GSB

BP

M M

ale Thread Bum

per Standoffs

®

OPTION

A variety of thread locking and lubricating materials can be applied to the threads. Nylon (shown), micro-en-capsuated epoxy and other locking elements prevent loosening due to vibration. Lubricating coatings reduce friction, heat buildup and galling during installation of mating fasteners. To specify a nylon locking element, insert PATCH at the end of the part description. Other locking and lubricating materials available by request.

Ex. BPM- 440 -1.500-STL-Z-PATCH

PF-BP 07/30/13 © PENCOM 2013

®

(10)

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NUT/wASHEr OPTIONS


Type

Thread Material / Finish

PENCOMPart

Number4–40

UNC–2BM3 x 0.5

6H

Zinc Plated CarbonSteel

StainlessSteel

MachineNut

• • NU1042

• • NU1043

• • NU1101

• • NU1100

FlatWasher

• • WA1413

• • WA1021

• • WA1928

• • WA1117

External ToothLock Washer

• • WA1349

• • WA1261

• • WA1116

• • WA1115

Internal ToothLock Washer

• • WA1201

• • WA1196

• • WA3609

• • WA2005

Split LockWasher

• • WA1025

• • WA1024

• • WA1327

• • WA1120

ConicalWasher

KEPS Nut

• • NU1538

• • NU2569

• • NU1412

• • NU2570

External ToothWasher

KEPS Nut

• • NU1045

• • NU1046

• • NU1104

• • NU1103

Nylon InsertLock Nut

• • NU2026

• • NU1785

• • NU2083

• • NU1413

The table below lists the part numbers of several plain nuts, washers, pre-assembled (KEPS) nuts, and locknuts supplied by PENCOM for use with the BPM Bumper Standoffs. For information on self-clinching nuts and other alternatives visit www.pencomsf.com or contact a PENCOM Account Manager.

PF-BP 07/30/13 © PENCOM 2013

®

GENErAL

Shank Code

Sheet

ShankLength

N

Thickness T

MForSwage

Installation

ForFlare

Installation (Min.)

A .031 (0.79) .095 (2.41) .015 (0.38) .075 (1.91)

B .062 (1.57) .125 (3.18) .035 (0.89) .105 (2.67)

C .094 (2.39) .155 (3.94) .065 (1.65) .135 (3.43)

D .125 (3.18) .185 (4.70) .095 (2.41) .165 (4.19)

(1) Custom shank lengths (N) available by request.

REV CHANGE DATE

12/29/11Drawn

CHKDRN

GSA

.31 (7.9) .25 (6.4)

.234/.231(5.94/5.87)

.249 (6.35) Max..24/.22

(6.1/5.6)3.5

1.75

L

.10 (2.5)

BPS General


N

M.239/.236(6.07/5.99)

Sheet Hole Detail forSwage-in Installation

.239/.236(6.07/5.99)

Sheet Hole Detail forFlare-in Installation

92°/88°T T

.203/.199(5.16/5.05)

02/08/12Tip redrawn GSB


03/23/12Moved sheet hole details GSD

(11)

FEATUrES

• Swaged design provides a quick and permanent installation in a variety of sheet materials and thicknesses. • Alternative flare-in installation eliminates swage protrusion on back of sheet.

• Installs close to sheet edge with minimal hoop stress.

All dimensions in inches (millimeters)


BPS — 1.500 — A — BRS — ET

Length Shank Code

Body Material

Code

Body Finish Code

BPS

Sw

age-in Bum

per S

tandoffs®

REV CHANGE DATE

12/29/11Drawn

CHKDRN

GSA

.31 (7.9) .25 (6.4)

.234/.231(5.94/5.87)

.249 (6.35) Max..24/.22

(6.1/5.6)3.5

1.75

L

.10 (2.5)

BPS General


N

M.239/.236(6.07/5.99)


.239/.236(6.07/5.99)


92°/88°T T

.203/.199(5.16/5.05)




BPSSwage-in Bumper Standoffs®

REV CHANGE DATE

12/29/11Drawn

CHKDRN

GSA

.31 (7.9) .25 (6.4)

.234/.231(5.94/5.87)

.249 (6.35) Max..24/.22

(6.1/5.6)3.5

1.75

L

.10 (2.5)

BPS General


N

M.239/.236(6.07/5.99)


.239/.236(6.07/5.99)


92°/88°T T

.203/.199(5.16/5.05)




REV CHANGE DATE

12/29/11Drawn

CHKDRN

GSA

.31 (7.9) .25 (6.4)

.234/.231(5.94/5.87)

.249 (6.35) Max..24/.22

(6.1/5.6)3.5

1.75

L

.10 (2.5)

BPS General


N

M.239/.236(6.07/5.99)


.239/.236(6.07/5.99)


92°/88°T T

.203/.199(5.16/5.05)




PF-BP 07/30/13 © PENCOM 2013

®

(12)

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BPS Swage-in Bumper Standoffs can be flared in as well and are popular choices for painted sheets and close-to edge application (swaged installation shown).


Body Material


Body Finish Code


BRS CDA 353 Brass TINElectroplated bright tin per ASTM B 545, Class B with clear preservative coating

BRS CDA 353 BrassTIN-

MATTEElectroplated matte tin per ASTM B 545, Class A with clear preservative coating


INC

H

L(Length)±.010

1.000

1.125

1.250

1.375

1.500

1.625

1.750

1.875

2.000

ME

TrIC

L(Length)±0.25

26

29

32

35

38

41

44

47

50


LENGTH

BPS

Sw

age-in Bum

per S

tandoffs®



PF-BP 07/30/13 © PENCOM 2013

®

(13)

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FLArE–IN INSTALLATION

1. Punch or drill countersink and hole in sheet as shown for flare-in installation.

2. Insert standoff in recessed anvil and place sheet hole over the standoff shank.

3. Squeeze the standoff shank between parallel and concentric anvil and flare punch. Flare the standoff shank into the sheet countersink using light pressure. Punch and anvil may be ordered using PENCOM part numbers TL1289 and TL1288, respectively, or made from hardened tool steel. Punch flare angle should match the sheet hole countersink angle.

SwAGE-IN INSTALLATION

1. Punch or drill hole in sheet as shown for swage-in installation.

2. Insert standoff in recessed anvil and place sheet hole over standoff shank.

3. Squeeze the standoff shank between parallel and concentric anvil and swage punch using light pressure to roll the shank over until contact is made with the sheet. Punch and anvil may be ordered using PENCOM part numbers TL1285 and TL1288, respectively, or made from hardened tool steel.

2

2

Swage-in Installation

BPS Installation

Punch

.256/.253(6.50/6.43)

Anvil

Installed

L Min.

Sheet

.50 (12.7)

Punch

Installed

Flare-in Installation

.256/.253(6.50/6.43)

AnvilL Min.

Sheet

Dimensions in inches (millimeters) Dimensions in inches (millimeters)

REV CHANGE DATE

12/29/11Drawn

CHKDRN

GSA




BPS

Sw

age-in Bum

per S

tandoffs®

Bumper ® is a regitered trademark of PENCOM

PF-BP 07/30/13 © PENCOM 2013

pf bp 7 30 13 - pencomsf.com · 5100-6100 (22.7-27.1) 360 ... with type iii clear chromate per astm...

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