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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.

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

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SupplierLocTypeMaterialFinishSizeDescriptionQty 
AbabaCAHex Head Cap ScrewSteelPlain1/4 x 3 1/21/4 x 3-1/2 sds hvy duty hex screw 3/8 hd b18.2.12
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AbabaCAHex Head Cap ScrewSteelPlain1/4 x 51/4 x 5 sds hvy duty hex screw 3/8 hd b18.2.16
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AbabaCAHex Head Cap ScrewSteelPlain1/4 x 61/4 x 6 sds hvy duty hex screw 3/8 hd b18.2.14
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AbabaCAHex Head Cap ScrewSteelPlain1/4 x 81/4 x 8 sds hvy duty hex screw 3/8 hd b18.2.19
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AbabaCAHex Head Cap ScrewGrade 5Zinc/Clear1/4-20 x 11/4-20 x 1 h/c gr 5 znc b18.2.13715
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AbabaCAHex Head Cap Screw316, 317, A4 StainlessPlain1/4-20 x 11/4-20 x 1 h/c 316 s/s b18.2.1271
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AbabaCAHex Head Cap ScrewGrade 8Plain1/4-20 x 11/4-20 x 1 h/c gr 8 pln b18.2.11600
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AbabaCAHex Head Cap ScrewGrade 8Zinc/Yellow1/4-20 x 11/4-20 x 1 h/c dom gr 8 yel znc b18.2.12697
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AbabaCAHex Head Cap ScrewGrade 9Zinc/Yellow1/4-20 x 11/4-20 x 1 h/c gr.9 yel znc b18.2.140
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AbabaCAHex Head Cap ScrewAluminumPlain1/4-20 x 11/4-20 x 1 h/c alum b18.2.159
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AbabaCAHex Head Cap ScrewBrassPlain1/4-20 x 11/4-20 x 1 h/c brass b18.2.169
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AbabaCAHex Head Cap ScrewSteelPlain1/4-20 x 11/4-20 x 1 h/c nylon b18.2.1224
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AbabaCAHex Head Cap Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/4-20 x 11/4-20 x 1 h/c s/s b18.2.12041
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AbabaCAHex Head Cap ScrewGrade 8Plain1/4-20 x 1 1/81/4-20 x 1 1/8 h/c dom gr 8 pln b18.2.11759
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AbabaCAHex Head Cap ScrewGrade 5Zinc/Clear1/4-20 x 1 1/41/4-20 x 1 1/4 h/c gr 5 znc b18.2.13489
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AbabaCAHex Head Cap Screw316, 317, A4 StainlessPlain1/4-20 x 1 1/41/4-20 x 1 1/4 h/c 316 s/s b18.2.150
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AbabaCAHex Head Cap ScrewGrade 8Zinc/Yellow1/4-20 x 1 1/41/4-20 x 1 1/4 h/c dom gr 8 yel znc b18.2.11288
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AbabaCAHex Head Cap ScrewSteelBlack Oxide1/4-20 x 1 1/41/4-20 x 1 1/4 h/c black nylon b18.2.11500
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AbabaCAHex Head Cap Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/4-20 x 1 1/41/4-20 x 1 1/4 h/c s/s b18.2.12650
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AbabaCAHex Head Cap ScrewGrade 5Plain1/4-20 x 1 1/21/4-20 x 1 1/2 h/c al-2000 (black) gr 5 b18.2.1340
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SIIINHex Head Cap Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/4-20 x 1/21/4-20x1/2 s/s hex cap screw) b18.2.11200
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SIIINHex Head Cap ScrewGrade 2Zinc/Clear1/4-20 x 2 3/41/4-20 x 2-3/4 (pt) grade 2 hex cap screw zinc cr+3 b18.2.1400
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SIIINHex Head Cap Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/4-20 x 31/4-20 x 3 18-8 stainless steel hex cap screw) b18.2.1250
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SIIINHex Head Cap Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/4-20 x 41/4-20 x 4 18-8 stainless steel hex cap screw) b18.2.1108
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SIIINHex Head Cap ScrewGrade 8Zinc/Yellow1/4-20 x 7/81/4-20 x 7/8 grd8 yz hex cap screw) b18.2.12200
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B & K FASTPAHex Head Cap ScrewAluminumPlain1/4-20 x 1 1/21/4-20 x 1 1/2 hex cap screws aluminum b18.2.1100
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B & K FASTPAHex Head Cap ScrewGrade 5Zinc/Clear1/4-28 x 1 1/21/4-28 x 1 1/2 hex cap screws gr 5 zinc w/ long lok strip b18.2.1716
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