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2 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 .

14 results, (click on any line for more information)

Buy Square Head Bolts from one of our FCH Network Members
SupplierLocTypeMaterialFinishSizeDescriptionQty 
BIG BOLTILSquare Head BoltGrade 5Plain7/16-14 x 2 1/2bolt & c/s square boltsquare b18.2.1890
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BIG BOLTILSquare Head BoltGrade 5Plain1/2-13 x 2 1/2bolt & c/s square boltsquare fulthr b18.2.110800
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BIG BOLTILSquare Head Bolt300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/8-11 x 2 1/2bolt & c/s square bolt300 (a1 a2 18-8 304 310 etc.)square b18.2.1500
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BIG BOLTILSquare Head BoltGrade 5Plain5/16-18 x 2 1/2bolt & c/s square boltsquare b18.2.15000
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BIG BOLTILSquare Head BoltGrade 8Plain5/8-11 x 2 1/2bolt & c/s square boltsquare b18.2.114600
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AbabaCASquare Head BoltGrade 8Plain3/4-10 x 2 1/23/4-10 x 2-1/2 square head bolt gr.8 plain b18.2.120
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AbabaCASquare Head BoltSteelZinc/Clear5/8-11 x 2 1/25/8-11 x 2 1/2 sq hd blt steel znc b18.2.1156
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AbabaCASquare Head BoltSteelPlain3/8-16 x 2 1/23/8-16 x 2 1/2 sq hd bolt steel pln b18.2.11
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B & K FASTPASquare Head BoltSteelPlain3/4-10 x 2 1/23/4-10 x 2 1/2 square bolts plain b18.2.157
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THRDFASTFLSquare Head BoltSteelGalvanized5/8-11 x 2 1/2square hd bolt hdg b18.2.1100
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THRDFASTFLSquare Head BoltSteelPlain3/8-16 x 2 1/2square hd bolt b18.2.13
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THRDFASTALSquare Head BoltSteelGalvanized5/8-11 x 2 1/2square hd bolt hdg b18.2.129
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THRDFASTMSSquare Head BoltSteelPlain5/16-18 x 2 1/2square hd bolt b18.2.1100
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FACCAOntSquare Head BoltGrade 2Plain5/8-11 x 2 1/2machine bolt square head (no nut) 5/8-11 unc x 2 1/2 long grade 2 low carbon steel plain ansi b18.2.1 b18.2.111,760
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