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1 1/4 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 .

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SupplierLocTypeMaterialFinishSizeDescriptionQty 
BIG BOLTILSquare Head BoltGrade 8Plain1 1/4-7 x 16bolt & c/s square boltsquare b18.2.1500
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BIG BOLTILSquare Head BoltGrade 8Plain1 1/4-12 x 10bolt & c/s square boltb18.2.1100
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BIG BOLTILSquare Head BoltGrade 8Plain1 1/4-7 x 6bolt & c/s square boltsquare b18.2.1500
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BIG BOLTILSquare Head BoltGrade 5Plain1 1/4-12 x 14bolt & c/s square boltb18.2.1543
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BIG BOLTILSquare Head BoltGrade 8Plain1 1/4-7 x 8bolt & c/s square boltsquare b18.2.1500
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BIG BOLTILSquare Head BoltGrade 5Plain1 1/4-12 x 12bolt & c/s square boltb18.2.1841
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BIG BOLTILSquare Head BoltGrade 5Plain1 1/4-7 x 13bolt & c/s square boltb18.2.1671
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BIG BOLTILSquare Head BoltGrade 8Plain1 1/4-7 x 20bolt & c/s square boltsquare b18.2.1500
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BIG BOLTILSquare Head BoltGrade 8Plain1 1/4-7 x 10bolt & c/s square boltsquare b18.2.1 b18.2.1500
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BIG BOLTILSquare Head BoltGrade 8Plain1 1/4-7 x 18bolt & c/s square boltsquare b18.2.1500
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BIG BOLTILSquare Head BoltGrade 5Plain1 1/4-12 x 18bolt & c/s square boltb18.2.1463
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BIG BOLTILSquare Head BoltGrade 5Plain1 1/4-12 x 5bolt & c/s square bolt 1/4b18.2.1495
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GLFOHSquare Head BoltGrade APlain1 1/4-7 x 101-1/4-7x10 square hd bolt a307 stl pln b18.2.1 ()40
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B & K FASTPASquare Head BoltGrade 8Plain1 1/4-7 x 91 1/4-7 x 9 square bolts gr 8 plain b18.2.12
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OSSCORISquare Head BoltSteelPlain1 1/4-7 x 41 1/4-7x4 square hd mach bolt b18.2.13
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Bostwick INSquare Head BoltGrade 8Plain1 1/4-7 x 71 1/4-7 x 7 square hd bolt gr 8 b18.2.120
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Bostwick INSquare Head BoltGrade 8Plain1 1/4-7 x 3 1/21 1/4-7 x 3 1/2 square hd bolt full thread gr 8 b18.2.12
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THRDFASTFLSquare Head BoltSteelPlain1 1/4-7 x 10square hd bolt b18.2.12
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THRDFASTALSquare Head BoltSteelGalvanized1 1/4-7 x 28square hd bolt rt6 hdg b18.2.1stock
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THRDFASTALSquare Head BoltSteelGalvanized1 1/4-7 x 24square hd bolt rt6 hdg b18.2.13
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THRDFASTALSquare Head BoltSteelPlain1 1/4-7 x 11square hd bolt b18.2.13
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THRDFASTALSquare Head BoltSteelGalvanized1 1/4-7 x 22square hd bolt rt6 hdg tfi b18.2.1stock
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THRDFASTALSquare Head BoltSteelGalvanized1 1/4-7 x 36square hd bolt rt6 hdg b18.2.14
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KBSTNSquare Head BoltGrade 5Plain1 1/4-7 x 141-1/4-7 x 14 square mach.bolt gr-5 b18.2.12
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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 BoltGrade 8Plain1 1/4-7 x 101-1/4-7 x 10 inch square!machbolt gr-8 b18.2.126
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KBSTNSquare Head BoltGrade 8Plain1 1/4-7 x 41-1/4-7 x 4 square!machbolt gr-8 b18.2.150
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KBSTNSquare Head BoltGrade 8Plain1 1/4-7 x 161-1/4-7 x 16 square!machbolt gr-8 b18.2.123
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KBSTNSquare Head BoltGrade 8Plain1 1/4-7 x 121-1/4-7 x 12 square!machbolt gr-8 b18.2.110
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KBSTNSquare Head BoltGrade 8Plain1 1/4-7 x 5 1/21-1/4-7 x 5 1/2 square!machbolt gr-8 b18.2.150
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KBSTNSquare Head BoltGrade 5Plain1 1/4-7 x 41-1/4-7 x 4 square mach.bolt gr-5 b18.2.110
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KBSTNSquare Head BoltGrade 8Plain1 1/4-7 x 81-1/4-7 x 8 square!machbolt gr-8 b18.2.124
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KBSTNSquare Head BoltGrade 8Plain1 1/4-7 x 7 1/21-1/4-7 x 7 1/2 square!machbolt gr-8 b18.2.139
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KBSTNSquare Head BoltGrade 8Plain1 1/4-7 x 91-1/4-7 x 9 square!machbolt gr-8 b18.2.146
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KBSTNSquare Head BoltGrade 8Plain1 1/4-7 x 8 1/21-1/4-7 x 8 1/2 square!machbolt gr-8 b18.2.143
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KBSTNSquare Head BoltGrade 8Plain1 1/4-7 x 61-1/4-7 x 6 square!machbolt gr-8 b18.2.136
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