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Square Head Bolts, Grade A (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 .

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

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SupplierLocTypeMaterialFinishSizeDescriptionQty 
GLFOHSquare Head BoltGrade APlain3/8-16 x 33/8-16x3 square hd bolt a307 stl pln b18.2.1 () () ()28,000
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GLFOHSquare Head BoltGrade APlain1-8 x 41-8x4 square hd bolt a307 stl pln b18.2.1 ()2,000
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BIG BOLTILSquare Head BoltGrade APlain1 1/8-7 x 5 1/4bolt & c/s square bolta307a b18.2.1213
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QFCTXSquare Head BoltGrade AGalvanized3/8-16 x 3/43/8-16x3/4 square head bolt a307 hdg b18.2.1987
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QFCTXSquare Head BoltGrade AGalvanized5/8-11 x 315/8-11x31 square head bolt a307 hdg 6 thd b18.2.12
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QFCTXSquare Head BoltGrade AGalvanized5/8-11 x 335/8-11x33 square head bolt a307 hdg 6 thd b18.2.13
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QFCTXSquare Head BoltGrade AGalvanized5/8-11 x 345/8-11x34 square head bolt a307 hdg 6 thd b18.2.13
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QFCTXSquare Head BoltGrade AGalvanized5/8-11 x 375/8-11x37 square head bolt a307 hdg 6 thd b18.2.13
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QFCTXSquare Head BoltGrade AGalvanized5/8-11 x 385/8-11x38 square head bolt a307 hdg 6 thd b18.2.12
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QFCTXSquare Head BoltGrade AGalvanized5/8-11 x 555/8-11x55 square head bolt a307 hdg 6 thd b18.2.12
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QFCTXSquare Head BoltGrade AGalvanized5/8-11 x 565/8-11x56 square head bolt a307 hdg 6 thd b18.2.12
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QFCTXSquare Head BoltGrade AGalvanized5/8-11 x 585/8-11x58 square head bolt a307 hdg 6 thd b18.2.12
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QFCTXSquare Head BoltGrade AGalvanized5/8-11 x 635/8-11x63 square head bolt a307 hdg 6 thd b18.2.12
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QFCTXSquare Head BoltGrade AGalvanized3/4-10 x 123/4-10x12 sq. head bolt a307 hdg b18.2.122
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QFCTXSquare Head BoltGrade AGalvanized3/4-10 x 133/4-10x13 sq. head bolt a307 hdg b18.2.114
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QFCTXSquare Head BoltGrade AGalvanized3/4-10 x 143/4-10x14 sq. hd bolt hdg a307 6 thd b18.2.130
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QFCTXSquare Head BoltGrade AGalvanized3/4-10 x 153/4-10x15 square head bolt a307 hdg b18.2.130
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QFCTXSquare Head BoltGrade AGalvanized3/4-10 x 163/4-10x16 square head bolt a307 hdg 6 thd b18.2.1237
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QFCTXSquare Head BoltGrade AGalvanized3/4-10 x 163/4-10x16 square head bolt a307 hdg 6 thd b18.2.120
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QFCTXSquare Head BoltGrade AGalvanized3/4-10 x 173/4-10x17 square head bolt a307 hdg 6 thd b18.2.137
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QFCTXSquare Head BoltGrade AGalvanized3/4-10 x 183/4-10x18 square head bolt a307 hdg 6 thd b18.2.156
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QFCTXSquare Head BoltGrade AGalvanized3/4-10 x 193/4-10x19 sq. head bolt a307 hdg 6 thd b18.2.140
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QFCTXSquare Head BoltGrade AGalvanized3/4-10 x 203/4-10x20 square head bolt a307 hdg 6 thd b18.2.16
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All SizeTXSquare Head BoltGrade APlain5/8-11 x 35/8-11 x 3 a307 square head bolt plain b18.2.140
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FACCAOntSquare Head BoltGrade AGalvanized1/2-13 x 1 1/2square hd machine bolt w/square nut 1/2-13 unc x 1-1/2 lg grade a steel as per astm a307 galvanized as per csa g164 b18.2.1600
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FACCAOntSquare Head BoltGrade AGalvanized3/4-10square hd machine bolt w/square nut 3/4-10 unc 2a x 2 3/4 long grade a steel as per astm a307 galvanized as per csa g164 b18.2.1300
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