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Square Head Bolts, Grade 8 (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 
GLFOHSquare Head BoltGrade 8Plain3/4-10 x 33/4-10x3 square hd bolt grade 8 stl pln b18.2.1 () () ()5
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BIG BOLTILSquare Head BoltGrade 8Zinc/Yellow3/4-10 x 5bolt & c/s square boltfulthr b18.2.1500
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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 8Plain3/8-16 x 10bolt & c/s square boltsquare b18.2.1500
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BIG BOLTILSquare Head BoltGrade 8Plain5/8-11 x 12bolt & c/s square boltsquare b18.2.11000
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BIG BOLTILSquare Head BoltGrade 8Plain3/4-10 x 8bolt & c/s square boltsquare b18.2.1800
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BIG BOLTILSquare Head BoltGrade 8Plain7/16-14 x 5bolt & c/s square boltsquare b18.2.12500
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BIG BOLTILSquare Head BoltGrade 8Plain7/16-14 x 3 1/2bolt & c/s square boltsquare b18.2.11000
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BIG BOLTILSquare Head BoltGrade 8Plain1 3/4-5 x 10bolt & c/s square boltsquare b18.2.1280
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BIG BOLTILSquare Head BoltGrade 8Plain7/8-9 x 26bolt & c/s square boltsquare b18.2.1260
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BIG BOLTILSquare Head BoltGrade 8Plain3/4-16 x 6 1/2bolt & c/s square boltb18.2.11187
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BIG BOLTILSquare Head BoltGrade 8Plain5/8-11 x 14bolt & c/s square boltsquare b18.2.11000
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BIG BOLTILSquare Head BoltGrade 8Plain3/4-10 x 4bolt & c/s square boltsquare b18.2.1600
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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 8Plain3/4-10 x 2 3/4bolt & c/s square boltsquare b18.2.1800
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BIG BOLTILSquare Head BoltGrade 8Zinc/Yellow3/4-16 x 4bolt & c/s square boltfulthr b18.2.1500
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BIG BOLTILSquare Head BoltGrade 8Plain5/8-11 x 6bolt & c/s square boltsquare b18.2.1200
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BIG BOLTILSquare Head BoltGrade 8Plain7/16-14 x 4bolt & c/s square boltsquare b18.2.11000
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BIG BOLTILSquare Head BoltGrade 8Plain5/8-11 x 8bolt & c/s square boltsquare b18.2.1400
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BIG BOLTILSquare Head BoltGrade 8Plain7/16-20 x 3bolt & c/s square boltsquare b18.2.1500
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BIG BOLTILSquare Head BoltGrade 8Plain1-8 x 16bolt & c/s square boltsquare b18.2.1150
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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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B & K FASTPASquare Head BoltGrade 8Zinc/Yellow7/16-20 x 57/16-20 x 5 square bolts gr 8 z yellow b18.2.124
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B & K FASTPASquare Head BoltGrade 8Plain1-8 x 3 1/21-8 x 3 1/2 square bolts gr 8 plain b18.2.12
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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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B & K FASTPASquare Head BoltGrade 8Plain1 1/2-12 x 81 1/2-12 x 8 square bolts gr 8 plain b18.2.11
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B & K FASTPASquare Head BoltGrade 8Plain5/8-11 x 5 1/25/8-11 x 5 1/2 square bolts gr 8 plain b18.2.17
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General FMISquare Head BoltGrade 8Plain5/8-18 x 2 1/45/8-18x2.25 square hd stop bolt gr8 b18.2.124,272
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Bostwick INSquare Head BoltGrade 8Plain1-14 x 51-14 x 5 square head bolt grade 8 b18.2.130
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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 8Plain1-14 x 4 1/21-14 x 4-1/2 square head bolt grade 8 b18.2.112
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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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THRDFASTALSquare Head BoltGrade 8Plain3/4nf-16x3 1/2 gr8 square hd bolt b18.2.1400
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KBSTNSquare Head BoltGrade 8Plain1-8 x 181-8 x 18 square mach bolt gr-8 b18.2.128
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KBSTNSquare Head BoltGrade 8Plain1-8 x 51-8 x 5 square mach bolt gr-8 b18.2.152
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KBSTNSquare Head BoltGrade 8Plain1-8 x 151-8 x 15 square!machbolt gr-8 b18.2.12
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KBSTNSquare Head BoltGrade 8Plain1-8 x 3 1/21-8 x 3 1/2 square mach bolt gr-8 b18.2.120
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KBSTNSquare Head BoltGrade 8Plain1-8 x 121-8 x 12 square mach bolt gr-8 b18.2.126
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KBSTNSquare Head BoltGrade 8Plain1 1/8-7 x 101-1/8-7 x 10 inch square mach bolt gr-8 b18.2.14
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KBSTNSquare Head BoltGrade 8Plain1-8 x 6 1/21-8 x 6 1/2 square!machbolt gr-8 b18.2.155
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KBSTNSquare Head BoltGrade 8Plain1-8 x 6 3/41-8 x 6 3/4 square mach bolt gr-8 b18.2.110
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KBSTNSquare Head BoltGrade 8Plain1 1/8-7 x 5 1/21-1/8-7 x 5 1/2 square!machbolt gr-8 b18.2.115
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KBSTNSquare Head BoltGrade 8Plain1-8 x 81-8 x 8 square!machbolt gr-8 b18.2.152
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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 8Plain1 1/8-7 x 8 1/21-1/8-7 x 8 1/2 square mach bolt gr-8 b18.2.16
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KBSTNSquare Head BoltGrade 8Plain1 1/2-6 x 121-1/2-6 x 12 square mach bolt gr-8 b18.2.125
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KBSTNSquare Head BoltGrade 8Plain1 1/2-6 x 61-1/2-6 x 6 square mach bolt gr-8 b18.2.131
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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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THRDFASTFLSquare Head BoltGrade 8Plain5/8-11 x 9 3/4gr8 square hd bolt b18.2.11
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THRDFASTFLSquare Head BoltGrade 8Plain3/4-10 x 4gr8 square hd bolt b18.2.117
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WSBKYSquare Head BoltGrade 8Zinc/Clear3/4-10 x 2 1/4blt sqr gr8 (zt) 3/4-10x2 1/4 b18.2.1199
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