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3 1/4 Hex Cap Screws (ASME B18. 2.1)

Hex Cap Screws are hex headed fasteners with external machine screw threads and differ from hex machine bolts by having a washer surface on the underside or bearing side of the head and a chamfered thread end. Hex cap screws have tighter dimensional tolerances than bolts. Metric hex cap screws are specified by various DIN, ISO and JIS standards, and US/Imperial hex cap screws are dimensionally specified by the ASME B18.2.1 specification.

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SupplierLocTypeMaterialFinishSizeDescriptionQty 
BIG BOLTILHex Head Cap ScrewGrade BPlain3 1/4-4 x 11bolt & c/s heavy h/b (b7 b8 a307b etc.)hvyhex b18.2.150
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BIG BOLTILHex Head Cap ScrewGrade BPlain3 1/4-4 x 20bolt & c/s heavy h/b (b7 b8 a307b etc.)hvyhex b18.2.140
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BIG BOLTILHex Head Cap ScrewGrade BPlain3 1/4-4 x 20bolt & c/s heavy h/b (b7 b8 a307b etc.)hvyhex b18.2.175
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BIG BOLTILHex Head Cap ScrewGrade BPlain3 1/4-4 x 16bolt & c/s heavy h/b (b7 b8 a307b etc.)hvyhex b18.2.150
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BIG BOLTILHex Head Cap ScrewGrade BPlain3 1/4-4 x 10bolt & c/s heavy h/b (b7 b8 a307b etc.)hvyhex b18.2.190
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BIG BOLTILHex Head Cap ScrewGrade BPlain3 1/4-4 x 20bolt & c/s heavy h/b (b7 b8 a307b etc.)hvyhex b18.2.140
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BIG BOLTILHex Head Cap ScrewGrade BPlain3 1/4-4 x 11bolt & c/s heavy h/b (b7 b8 a307b etc.)hvyhex b18.2.175
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BIG BOLTILHex Head Cap ScrewGrade BPlain3 1/4-4 x 20bolt & c/s heavy h/b (b7 b8 a307b etc.)hvyhex b18.2.160
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BIG BOLTILHex Head Cap ScrewGrade BPlain3 1/4-4 x 18bolt & c/s heavy h/b (b7 b8 a307b etc.)hvyhex b18.2.150
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