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4 1/2 inch length Square Head Bolts (ASME B18. 2.1)

Square Head Bolts were once the most common form of bolt, until they were replaced by hex head bolts. They are covered under ANSI Standard B18.2.1 and are now most commonly used for aesthetic purposes to provide a rustic look .

10 results, (click on any line for more information)
Buy Square Head Bolts from one of our FCH Network Members
SupplierLocTypeMaterialFinishSizeDescriptionQty 
BHAMALSquare Head BoltSteelPlain7/8-9 x 4 1/27/8-9x4 1/2 square head bolt b18.2.15
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BIG BOLTILSquare Head BoltGrade 5Plain5/8-11 x 4 1/2bolt & c/s square boltsquare b18.2.13316
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B & K FASTPASquare Head BoltSteelGalvanized5/8-11 x 4 1/25/8-11 x 4 1/2 galv square bolts b18.2.123
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B & K FASTPASquare Head BoltSteelPlain7/8-9 x 4 1/27/8-9 x 4 1/2 square bolts plain b18.2.176
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B & K FASTPASquare Head BoltSteelPlain3/4-10 x 4 1/23/4-10 x 4 1/2 square bolts plain b18.2.18
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Bostwick INSquare Head BoltGrade 8Plain1-14 x 4 1/21-14 x 4-1/2 square head bolt grade 8 b18.2.112
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THRDFASTFLSquare Head BoltSteelPlain1 1/8-7 x 4 1/2square hd bolt b18.2.14
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THRDFASTALSquare Head BoltSteelGalvanized5/8-11 x 4 1/2square hd bolt hdg b18.2.198
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KBSTNSquare Head BoltGrade 8Plain1 1/4-7 x 4 1/21-1/4-7 x 4 1/2 square!machbolt gr-8 b18.2.190
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KBSTNSquare Head BoltSteelPlain1/2-13 x 4 1/21/2-13 x 4 1/2 square hd mach.bolt b18.2.1358
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