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5 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 .

11 results, (click on any line for more information)
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SupplierLocTypeMaterialFinishSizeDescriptionQty 
GLFOHSquare Head BoltSteelPlain1/2-13 x 5 1/21/2-13x5-1/2 square hd bolt stl pln b18.2.1 ()310
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AbabaCASquare Head BoltSteelPlain3/8-16 x 5 1/23/8-16 x 5-1/2 sq hd bolt steel pln b18.2.1189
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ASMCILSquare Head BoltGrade APlain3/8-16 x 5 1/2(pt) coarse a307 gra square hd m/b low carb b18.2.1150
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B & K FASTPASquare Head BoltSteelPlain1/4-20 x 5 1/21/4-20 x 5 1/2 square bolts plain b18.2.120
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B & K FASTPASquare Head BoltSteelPlain7/8-9 x 5 1/27/8-9 x 5 1/2 square bolts plain b18.2.1277
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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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B & K FASTPASquare Head BoltSteelPlain3/4-10 x 5 1/23/4-10 x 5 1/2 square bolts plain b18.2.1267
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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 5Plain1-8 x 5 1/21-8 x 5 1/2 square mach.bolt gr-5 b18.2.112
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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 8Plain1-8 x 5 1/21-8 x 5 1/2 square mach bolt gr-8 b18.2.140
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