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5/8 Square Head Bolts

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 .

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

Buy Square Head Bolts from one of our FCH Network Members
SupplierLocTypeMaterialFinishSizeDescriptionQty 
ACCURATEILSquare Head BoltSteelPlain5/8-11 x 1 1/4bolt square machine540
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ACCURATEILSquare Head BoltSteelZinc/Clear5/8-11 x 1 1/4bolt square machine215
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AbabaCASquare Head BoltSteelZinc/Clear5/8-11 x 25/8-11 x 2 sq hd blt steel znc b18.2.16
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YANKEENHSquare Head BoltSteelPlain5/8-11 x 25/8-11 x 2 square hd bolt19
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JacksonMSSquare Head BoltGrade 5Zinc/Clear5/8-11 x 2 1/2nc square bolt gr.58
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JacksonMSSquare Head BoltGrade 8Plain5/8-11 x 2 1/2square bolt gr. 81
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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 b18.2.16
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YANKEENHSquare Head BoltSteelPlain5/8-11 x 2 1/25/8-11 x 2 1/2 square hd bolt7
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JacksonMSSquare Head BoltGrade 5Zinc/Clear5/8-11 x 3nc square bolt gr.52
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ACCURATEILSquare Head BoltGrade 5Zinc/Clear5/8-11 x 3 1/4bolt square machine gr510
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WeaverWASquare Head BoltGrade 5Plain5/8-11 x 3 1/25/8-11x3 1/2 gr5 square hd bolt plain14
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JET FITTINGCASquare Head BoltGrade APlain5/8-11 x 3 1/25/8-11x3-1/2 (pt) square bolt steel a307 plain b18.2.195
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YANKEENHSquare Head BoltSteelPlain5/8-11 x 45/8-11 x 4 square hd bolt20
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JacksonMSSquare Head BoltGrade 5Plain5/8-11 x 4 1/2nc square bolt gr. 5 f/t5
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JacksonMSSquare Head BoltGrade 8Plain5/8-11 x 4 1/25/8-11x4-1/2 square bolt gr. 81
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YANKEENHSquare Head BoltSteelPlain5/8-11 x 75/8-11 x 7 square hd bolt38
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YANKEENHSquare Head BoltGrade 5Zinc/Clear5/8-11 x 75/8-11x7 square head bolt grade 5 steel zinc plated38
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ACCURATEILSquare Head BoltSteelPlain5/8-11 x 8 1/2bolt square machine50
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WeaverWASquare Head BoltGrade 5Plain5/8-11 x 2 3/4 gr5 square hd bolt plain13
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