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Hex Cap Screws, Grade B (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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BIG BOLTILHex Head Cap ScrewGrade BPlain2 3/4-4 x 20bolt & c/s heavy h/b (b7 b8 a307b etc.)hvyhex b18.2.140
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BIG BOLTILHex Head Cap ScrewGrade BPlain1 1/4-12 x 16bolt & c/s heavy h/b (b7 b8 a307b etc.)b18.2.1384
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BIG BOLTILHex Head Cap ScrewGrade BPlain3-4 x 16bolt & c/s heavy h/b (b7 b8 a307b etc.)hvyhex b18.2.150
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BIG BOLTILHex Head Cap ScrewGrade BPlain7/8-14 x 16bolt & c/s heavy h/b (b7 b8 a307b etc.)b18.2.1600
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BIG BOLTILHex Head Cap ScrewGrade BPlain2 3/4-4 x 18bolt & c/s heavy h/b (b7 b8 a307b etc.)hvyhex b18.2.150
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BIG BOLTILHex Head Cap ScrewGrade BPlain3-4 x 28bolt & c/s heavy h/b (b7 b8 a307b etc.)hvyhex b18.2.150
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BIG BOLTILHex Head Cap ScrewGrade BPlain3/4-10 x 75/81 3/8bolt & c/s heavy h/b (b7 b8 a307b etc.)t b18.2.1350
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BIG BOLTILHex Head Cap ScrewGrade BPlain1 1/2-6 x 16bolt & c/s heavy h/b (b7 b8 a307b etc.)b18.2.1560
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BIG BOLTILHex Head Cap ScrewGrade BPlain1-14 x 16bolt & c/s heavy h/b (b7 b8 a307b etc.)b18.2.1400
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BIG BOLTILHex Head Cap ScrewGrade BPlain3-4 x 8bolt & c/s heavy h/b (b7 b8 a307b etc.)hvyhex b18.2.1100
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BIG BOLTILHex Head Cap ScrewGrade BPlainbolt & c/s heavy h/b (b7 b8 a307b etc.)steel2 1/4-4 1/2x10b18.2.1116
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BIG BOLTILHex Head Cap ScrewGrade BPlain3/4-10 x 9bolt & c/s heavy h/b (b7 b8 a307b etc.) b18.2.11400
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BIG BOLTILHex Head Cap ScrewGrade BPlain2 1/4-4 1/2 x 16bolt & c/s heavy h/b (b7 b8 a307b etc.)hvyhex b18.2.1200
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BIG BOLTILHex Head Cap ScrewGrade BPlain1 1/4-7 x 19bolt & c/s heavy h/b (b7 b8 a307b etc.)b18.2.1570
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BIG BOLTILHex Head Cap ScrewGrade BPlain71 1/2-6 x 7bolt & c/s square bolthvyhex b18.2.1100
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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 b18.2.150
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BIG BOLTILHex Head Cap ScrewGrade BPlainbolt & c/s c/s 71/2-20x2b18.2.12060
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BIG BOLTILHex Head Cap ScrewGrade BPlain2 3/4-4 x 12bolt & c/s heavy h/b (b7 b8 a307b etc.)hvyhex b18.2.175
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BIG BOLTILHex Head Cap ScrewGrade BPlain1 1/8-7 x 5bolt & c/s heavy h/b (b7 b8 a307b etc.)square b18.2.1 b18.2.1210
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BIG BOLTILHex Head Cap ScrewGrade BPlainbolt & c/s heavy h/b (b7 b8 a307b etc.)steel3-4x12hvyhex b18.2.150
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B & K FASTPAHex Head Cap ScrewGrade BPlain7/8-9 x 2 1/27/8-9 x 2 1/2 hex cap screws a307b b18.2.182
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B & K FASTPAHex Head Cap ScrewGrade BPlain7/8-9 x 3 3/47/8-9 x 3 3/4 hex cap screws a307b plain b18.2.173
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MMFMIHex Head Cap ScrewGrade BPlain5/16-24 x 1 1/45/16-24x1-1/4 grade bd zdy hhcs b1821bh031f125n b18.2.125797
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