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2 1/2 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 
American WIHex Head Cap ScrewASTM A354 Grade BDPlain2 1/2-4 x 112-1/2-4x11 nc hex hd c/s a354 bc per ansi b18.2.1 & straightness per page c-22 ifi 6ed3
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BIG BOLTILHex Head Cap ScrewGrade BPlain2 1/2-4 x 20bolt & c/s heavy h/b (b7 b8 a307b etc.)hvyhex b18.2.1150
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BIG BOLTILHex Head Cap ScrewGrade BPlain2 1/2-4 x 14bolt & c/s heavy h/b (b7 b8 a307b etc.)hvyhex b18.2.1200
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BIG BOLTILHex Head Cap ScrewGrade BPlain2 1/2-4 x 26bolt & c/s heavy h/b (b7 b8 a307b etc.)hvyhex b18.2.175
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BIG BOLTILHex Head Cap ScrewGrade BPlain2 1/2-4 x 4bolt & c/s heavy h/b (b7 b8 a307b etc.)b18.2.1140
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BIG BOLTILHex Head Cap ScrewGrade BPlain2 1/2-4 x 7bolt & c/s heavy h/b (b7 b8 a307b etc.)b18.2.1140
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BIG BOLTILHex Head Cap ScrewGrade BPlain2 1/2-4 x 20bolt & c/s heavy h/b (b7 b8 a307b etc.)hvyhex b18.2.1100
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BIG BOLTILHex Head Cap ScrewGrade BPlain2 1/2-4 x 26bolt & c/s heavy h/b (b7 b8 a307b etc.)hvyhex b18.2.175
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THRDFASTALHex Head Cap ScrewGrade 5Plain2 1/2-4 x 5 1/2gr5 hex c/s b18.2.11
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