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5/16 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.

Hex Head Cap Screw (b18.2.1), showing 200, (click on any line for more information)

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SupplierLocTypeMaterialFinishSizeDescriptionQty 
AbabaCAHex Head Cap ScrewGrade 5Plain5/16-18 x 15/16-18 x 1 h/c al-2000 (black) gr 5 b18.2.11728
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AbabaCAHex Head Cap ScrewGrade 5Zinc/Black5/16-18 x 15/16-18 x 1 h/c black zinc super-seal & wax gr 5 b18.2.161
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AbabaCAHex Head Cap ScrewGrade 5Zinc/Clear5/16-18 x 15/16-18 x 1 h/c gr 5 znc b18.2.11556
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AbabaCAHex Head Cap ScrewGrade 8Zinc/Yellow5/16-18 x 15/16-18 x 1 h/c dom gr 8 yel znc b18.2.12084
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AbabaCAHex Head Cap Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/16-18 x 15/16-18 x 1 h/c s/s b18.2.11400
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AbabaCAHex Head Cap ScrewGrade 5Plain5/16-18 x 1 1/45/16-18 x 1 1/4 h/c al-2000 (black) gr 5 b18.2.13344
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AbabaCAHex Head Cap ScrewGrade 5Plain5/16-18 x 1 1/45/16-18 x 1-1/4 hex cap screw gr.5 al-2000 silver b18.2.110
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AbabaCAHex Head Cap ScrewSteelZinc/Black5/16-18 x 1 1/45/16-18 x 1 1/4 h/c black zinc super-seal & wax g b18.2.1199
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AbabaCAHex Head Cap ScrewGrade 5Zinc/Clear5/16-18 x 1 1/45/16-18 x 1 1/4 h/c gr 5 znc b18.2.13386
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AbabaCAHex Head Cap Screw316, 317, A4 StainlessPlain5/16-18 x 1 1/45/16-18 x 1 1/4 h/c 316 s/s b18.2.1100
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AbabaCAHex Head Cap ScrewGrade 8Zinc/Yellow5/16-18 x 1 1/45/16-18 x 1 1/4 h/c dom gr 8 yel znc b18.2.1728
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AbabaCAHex Head Cap ScrewGrade 9Zinc/Yellow5/16-18 x 1 1/45/16-18 x 1 1/4 h/c gr.9 yel znc b18.2.1180
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AbabaCAHex Head Cap Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/16-18 x 1 1/45/16-18 x 1 1/4 h/c s/s b18.2.12693
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AbabaCAHex Head Cap ScrewGrade 5Zinc/Clear5/16-18 x 1 1/25/16-18 x 1 1/2 h/c gr 5 znc b18.2.1520
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AbabaCAHex Head Cap ScrewGrade 8Zinc/Yellow5/16-18 x 1 1/25/16-18 x 1 1/2 h/c dom gr 8 yel znc b18.2.1628
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AbabaCAHex Head Cap ScrewGrade 9Zinc/Yellow5/16-18 x 1 1/25/16-18 x 1 1/2 h/c f911 yel znc b18.2.185
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AbabaCAHex Head Cap Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/16-18 x 1 1/25/16-18 x 1 1/2 h/c s/s b18.2.11483
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AbabaCAHex Head Cap ScrewGrade 5Zinc/Clear5/16-18 x 1 3/45/16-18 x 1 3/4 h/c gr 5 znc b18.2.1985
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AbabaCAHex Head Cap ScrewGrade 5Zinc/Clear5/16-18 x 1 3/45/16-18 x 1 3/4 h/c nyl patch gr 5 znc b18.2.1790
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AbabaCAHex Head Cap ScrewGrade 8Zinc/Yellow5/16-18 x 1 3/45/16-18 x 1 3/4 h/c dom gr 8 yel znc b18.2.1420
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SIIINHex Head Cap Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/16-18 x 3 1/25/16-18 x 3-1/2 18-8 stainless steel hex cap screw) b18.2.1490
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B & K FASTPAHex Head Cap ScrewAluminumPlain5/16-18 x 25/16-18 x 2 hex cap screws aluminum b18.2.1169
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B & K FASTPAHex Head Cap ScrewGrade 5Zinc/Clear5/16-18 x 15/16-18 x 1 hex cap screws gr 5 zinc b18.2.11512
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