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#5 Flat Head Cap Screws (ASME B18. 3)

Flat Head Socket Cap Screws are designed to be seated in countersunk holes, and align flush with the surface of the assembly when installed. Flat head socket cap screws have a flat top surface, an indented hex and a conical bearing surface with a head angle of 82°. Flat head socket cap screws are commonly used in machine parts, die fixturing, and clamping.

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SupplierLocTypeMaterialFinishSizeDescriptionQty 
AbabaCAFlat Head Socket Cap ScrewSteelPlain#5-40 x 3/85-40 x 3/8 flat soc cap screw alloy b18.2.1 b18.3100
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AbabaCAFlat Head Socket Cap Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#5-40 x 1/25-40 x 1/2 flat soc cap screw s/s b18.2.1 b18.366
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AbabaCAFlat Head Socket Cap ScrewSteelPlain#5-40 x 5/85-40 x 5/8 flat soc cap screw alloy b18.2.1 b18.3100
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ASMCILFlat Head Socket Cap ScrewSteelPlain#5-40 x 1(ft) coarse socket flat hd c/s b18.2.1 b18.31,025
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ASMCILFlat Head Socket Cap Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#5-40 x 1/2coarse socket flat hd c/s ss18-8 b18.32,394
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ASMCILFlat Head Socket Cap ScrewSteelPlain#5-44 x 5/8(ft) fine socket flat hd c/s b18.32,175
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ASMCILFlat Head Socket Cap ScrewSteelPlain#5-44 x 1(ft) fine socket flat hd c/s b18.37
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ASMCILFlat Head Socket Cap Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#5-40 x 3/4coarse socket flat hd c/s ss18-8 b18.350
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JET FITTINGCAFlat Head Socket Cap ScrewSteelBlack Oxide#5-40 x 1/2#5-40x1/2 flat hdsock caps stl blk ox 211024 b18.2.1 b18.3350
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JET FITTINGCAFlat Head Socket Cap ScrewSteelBlack Oxide#5-44 x 3/8#5-44x3/8 flat hdsock caps stl blk ox 721054 b18.2.1 b18.31100
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JET FITTINGCAFlat Head Socket Cap ScrewSteelBlack Oxide#5-40 x 3/8#5-40x3/8 flat hdsock caps stl blk ox 211023 b18.2.1 b18.32300
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JET FITTINGCAFlat Head Socket Cap ScrewSteelBlack Oxide#5-40 x 1/4#5-40x1/4 flat hdsock caps stl blk ox 211022 b18.2.1 b18.32200
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JET FITTINGCAFlat Head Socket Cap ScrewSteelPlain#5-40 x 3/8#5-40x3/8 non-standard flat hdsock cap 712061 b18.2.1 b18.3296
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StandardMAFlat Head Socket Cap Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#5-40 x 1/25-40x1/2 flat head socket cap screw 18-8 stainless steel b18.2.1 b18.311600
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StandardMAFlat Head Socket Cap Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#5-40 x 3/85-40x3/8 flat head socket cap screw 18-8 stainless steel b18.2.1 b18.39867
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Marine FastenersFLFlat Head Socket Cap Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#5-40 x 1/25-40x1/2 flat soc cs ss b18.2.1 b18.361750
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Bostwick INFlat Head Socket Cap ScrewSteelPlain#5-40 x 1/25-40 x 1/2 flat soc cap screw (usa mfg) alloy b18.2.1 b18.3172
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Bostwick INFlat Head Socket Cap ScrewSteelPlain#5-40 x 3/45-40 x 3/4 flat soc cap screw (usa mfg) alloy b18.2.1 b18.398
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Bostwick INFlat Head Socket Cap ScrewSteelPlain#5-40 x 1/45-40 x 1/4 flat soc cap screw (usa mfg) alloy b18.2.1 b18.3120
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JET FITTINGCAFlat Head Socket Cap ScrewSteelPlain#5-40 x 1/2cap screw flat socket 5-40x1/2 alloy steel b18.2.1 b18.3450
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JET FITTINGCAFlat Head Socket Cap Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#5-40 x 3/8cap screw flat socket 540x3/8 stainless steel b18.2.1 b18.3288
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THRDFASTFLFlat Head Socket Cap Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#5-40 x 3/818-8 ss flat socket c/s b18.2.1 b18.373
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THRDFASTFLFlat Head Socket Cap ScrewSteelPlain#5-40 x 3/8flat socket c/s b18.2.1 b18.3100
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