square head bolts _ portland bolt.pdf

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Home > Products > Headed Bolts > Square Head Bolts

Square Head Bolts

Square head machine boltswere the industry standard prior to hexbolts gaining prominence. Square boltsare now most commonly used foraesthetic purposes to provide a rusticlook in a new structure or to matchexisting fasteners in an older structure.Square lag screws are also used forthese purposes.

Cross arm or machine bolts arecommonly supplied for the utility industryand included an added cone point.

ManufacturingPortland Bolt manufactures square bolts from 1/2" diameter through 2" diameter in mostASTM, AASHTO, and SAE specifications. Special tooling can be created to producenonstandard head dimensions or bolt heads with your company's name and/or logo.Portland Bolt stocks square head blanks that are used for small orders or expediteddeliveries.

StockPortland Bolt does not stock any square head machine bolts, and in most cases, squarehead bolts are not readily available through fastener distributors. Typically, square head boltswill need to be custom manufactured.

Standard Thread LengthsBolt lengths < 6": Thread length = (2 X diameter) + 1/4"Bolt lengths > 6": Thread length = (2 X diameter) + 1/2"

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ASTM GalvanizingSpecifications

Dimensions

BoltDiameter

D F C H

BodyDiameter

Width Across FlatsWidth

AcrossCorners

Height

Max Basic Max Min Max Min Basic Max Min

3/8 0.388 9/16 0.562 0.544 0.795 0.747 1/4 0.268 0.232

1/2 0.515 3/4 0.750 0.725 1.061 0.995 21/64 0.348 0.308

5/8 0.642 15/16 0.938 0.906 1.326 1.244 27/64 0.444 0.400

3/4 0.768 1-1/8 1.125 1.088 1.591 1.494 1/2 0.524 0.476

7/8 0.895 1-5/16 1.312 1.269 1.856 1.742 19/32 0.620 0.568

1 1.022 1-1/2 1.500 1.450 2.121 1.991 21/32 0.684 0.628

1-1/8 1.149 1-11/16 1.688 1.631 2.386 2.239 3/4 0.780 0.720

1-1/4 1.277 1-7/8 1.875 1.812 2.652 2.489 27/32 0.876 0.812

1-3/8 1.404 2-1/16 2.062 1.994 2.917 2.738 29/32 0.940 0.872

1-1/2 1.531 2-1/4 2.250 2.175 3.182 2.986 1 1.036 0.964

1-3/4* 2-9/16 1-3/16

2* 2-15/16 1-5/16

* ASME only defines head dimensions up to 1-1/2". Dimensions for 1-3/4 and 2" areapproximate and not covered under the ASME dimensional specifications.

Dimensions per ASME B18.2.1 1996

Related Links:

Portland Bolt & Manufacturing Company, Inc.3441 NW Guam Street, Portland, OR 97210

1996-2013 | (800)547-6758

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