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3 inch length 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 Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/4-20 x 31/4-20 x 3 flt soc cap s/s b18.2.1 b18.3240
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AbabaCAFlat Head Socket Cap ScrewSteelPlain1/4-20 x 31/4-20 x 3 flat soc cap screw alloy b18.2.1 b18.3742
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AbabaCAFlat Head Socket Cap Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/16-18 x 35/16-18 x 3 flat soc cap screw s/s b18.2.1 b18.3146
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AbabaCAFlat Head Socket Cap ScrewSteelPlain5/16-18 x 35/16-18 x 3 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.)Plain3/8-16 x 33/8-16 x 3 flat soc cap screw s/s b18.2.1 b18.389
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AbabaCAFlat Head Socket Cap ScrewSteelPlain3/8-16 x 33/8-16 x 3 flat soc cap screw alloy b18.2.1 b18.385
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AbabaCAFlat Head Socket Cap Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-13 x 31/2-13 x 3 flat soc cap screw s/s b18.2.1 b18.3119
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AbabaCAFlat Head Socket Cap ScrewSteelPlain1/2-13 x 31/2-13 x 3 flat soc cap screw alloy b18.2.1 b18.365
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AbabaCAFlat Head Socket Cap ScrewSteelPlain1/2-20 x 31/2-20 x 3 flat soc cap screw alloy b18.2.1 b18.316
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AbabaCAFlat Head Socket Cap ScrewSteelPlain5/8-11 x 35/8-11 x 3 flat soc cap screw alloy b18.2.1 b18.395
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AbabaCAFlat Head Socket Cap ScrewSteelPlain3/4-10 x 33/4-10 x 3 flat soc cap screw alloy b18.2.1 b18.349
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AbabaCAFlat Head Socket Cap Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#10-24 x 310-24 x 3 flt soc cap s/s b18.2.1 b18.3150
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GLFOHFlat Head Socket Cap ScrewSteelPlain1/2-13 x 31/2-13x3 flat stl pln b18.2.1 b18.3 () () ()104
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GLFOHFlat Head Socket Cap ScrewSteelPlain5/8-11 x 35/8-11x3 flat stl pln b18.2.1 b18.3 () () ()75
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GLFOHFlat Head Socket Cap ScrewSteelPlain5/16-18 x 35/16-18x3 flat stl pln b18.2.1 b18.3 () () ()745
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GLFOHFlat Head Socket Cap ScrewSteelZinc/Clear1/2-13 x 31/2-13x3 flat stl zc b18.2.1 b18.3 () () ()147
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GLFOHFlat Head Socket Cap ScrewSteelPlain7/8-9 x 37/8-9x3 flat stl pln b18.2.1 b18.3 () () ()3
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GLFOHFlat Head Socket Cap Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/4-20 x 31/4-20x3 flat stl 18-8 s/s b18.2.1 b18.3 () () ()643
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GLFOHFlat Head Socket Cap ScrewSteelZinc/Clear3/4-10 x 33/4-10x3 flat stl zc b18.2.1 b18.3 () () ()195
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GLFOHFlat Head Socket Cap ScrewSteelPlain1-8 x 31-8x3 flat stl pln b18.2.1 b18.3 () () ()90
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BHAMALFlat Head Socket Cap Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/8-11 x 35/8-11x3 flat soc cap scr 300 ser ss b18.2.1 b18.3200
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BHAMALFlat Head Socket Cap Screw316, 317, A4 StainlessPlain1/2-13 x 31/2-13x3 flat hdsoc cap 316 s/s b18.2.1 b18.375
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BHAMALFlat Head Socket Cap ScrewSteelPlain3/4-10 x 33/4-10x3 flat soc cap scr b18.2.1 b18.3388
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ASMCILFlat Head Socket Cap Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-13 x 31/2-13x3 coarse socket flat hd cap screw ss18-8 b18.2.1 b18.3100
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ASMCILFlat Head Socket Cap ScrewSteelPlain1/4-28 x 3(pt) fine socket flat hd c/s b18.3600
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ASMCILFlat Head Socket Cap ScrewSteelPlain#10-32 x 3#10-32x3 (pt) fine socket flat hd cap screw alloy pln b18.2.1 b18.375
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ASMCILFlat Head Socket Cap Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/4-20 x 31/4-20x3 coarse socket flat hd cap screw ss18-8 b18.2.1 b18.350
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AbabaCAFlat Head Socket Cap Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/4-20 x 31/4-20 x 3 flt soc cap s/s b18.2.1 b18.325
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AbabaCAFlat Head Socket Cap ScrewSteelPlain1/4-20 x 31/4-20 x 3 flat soc cap screw alloy b18.2.1 b18.375
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AbabaCAFlat Head Socket Cap Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/16-18 x 35/16-18 x 3 flat soc cap screw s/s b18.2.1 b18.325
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AbabaCAFlat Head Socket Cap Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain3/8-16 x 33/8-16 x 3 flat soc cap screw s/s b18.2.1 b18.340
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AbabaCAFlat Head Socket Cap Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-13 x 31/2-13 x 3 flat soc cap screw s/s b18.2.1 b18.35
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AbabaCAFlat Head Socket Cap ScrewSteelPlain1/2-13 x 31/2-13 x 3 flat soc cap screw alloy b18.2.1 b18.320
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AbabaCAFlat Head Socket Cap ScrewSteelPlain5/8-11 x 35/8-11 x 3 flat soc cap screw alloy b18.2.1 b18.315
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SIIINFlat Head Socket Cap ScrewSteelPlain1/2-13 x 31/2-13x3 fhscs) b18.2.1 b18.350
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Infasco DGAFlat Head Socket Cap ScrewSteelPlain5/8-11 x 35/8-11 x 3 hex flat skt cntk b18.3 (alloy) unc ft p90
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JET FITTINGCAFlat Head Socket Cap Screw316, 317, A4 StainlessPlain1/4-20 x 31/4-20x3 flat hex socket stainless steel 316 plain 063087 b18.2.1 b18.375
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StandardMAFlat Head Socket Cap Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/16-18 x 35/16-18x3 flat head socket cap screw 18-8 stainless steel b18.2.1 b18.33095
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StandardMAFlat Head Socket Cap Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-13 x 31/2-13x3 flat head socket cap screw 18-8 stainless steel b18.2.1 b18.3426
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StandardMAFlat Head Socket Cap Screw316, 317, A4 StainlessPlain#10-32 x 310-32x3 flat head socket cap screw 316 stainless steel b18.2.1 b18.3-390
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StandardMAFlat Head Socket Cap Screw316, 317, A4 StainlessPlain1/4-20 x 31/4-20x3 flat head socket cap screw 316 stainless steel b18.2.1 b18.3870
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StandardMAFlat Head Socket Cap Screw316, 317, A4 StainlessPlain5/16-18 x 35/16-18x3 flat head socket cap screw 316 stainless steel b18.2.1 b18.32966
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StandardMAFlat Head Socket Cap Screw316, 317, A4 StainlessPlain1/2-13 x 31/2-13x3 flat head socket cap screw 316 stainless steel b18.2.1 b18.31105
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StandardMAFlat Head Socket Cap Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/8-11 x 35/8-11x3 flat head socket cap screw 18-8 stainless steel b18.2.1 b18.348
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QFCTXFlat Head Socket Cap Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain3/8-16 x 33/8-16x3 flat head soc cap screw 18-8 s/s b18.2.1 b18.36
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QFCTXFlat Head Socket Cap Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/4-20 x 31/4-20x3 flat head hex socket cap 18-8 ss domestic b18.2.1 b18.360
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QFCTXFlat Head Socket Cap ScrewSteelZinc/Clear5/16-18 x 35/16-18x3 flat s/c alloy zinc b18.2.1 b18.3200
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QFCTXFlat Head Socket Cap ScrewSteelZinc/Clear1/2-13 x 31/2-13x3 flat soc c/s alloy zinc b18.2.1 b18.311
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B & K FASTPAFlat Head Socket Cap ScrewSteelPlain5/16-18 x 35/16-18 x 3 torx flat fl0or screws b18.2.1 b18.3600
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B & K FASTPAFlat Head Socket Cap ScrewSteelPlain3/8-16 x 33/8-16 x 3 flat hd socket cap screws b18.2.1 b18.3352
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B & K FASTPAFlat Head Socket Cap ScrewSteelPlain1/2-13 x 31/2-13 x 3 flat hd socket cap screws b18.2.1 b18.3150
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B & K FASTPAFlat Head Socket Cap ScrewSteelPlain5/8-11 x 35/8-11 x 3 flat hd socket cap screws b18.2.1 b18.382
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B & K FASTPAFlat Head Socket Cap ScrewSteelPlain3/4-10 x 33/4-10 x 3 flat hd socket cap screws b18.2.1 b18.360
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B & K FASTPAFlat Head Socket Cap ScrewSteelPlain7/8-9 x 37/8-9 x 3 flat hd socket cap screws b18.2.1 b18.330
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B & K FASTPAFlat Head Socket Cap ScrewSteelPlain1-8 x 31-8 x 3 flat hd socket cap screws b18.2.1 b18.342
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B & K FASTPAFlat Head Socket Cap Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/4-20 x 31/4-20 x 3 flat socket cap screws 18-8 ss b18.2.1 b18.3126
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B & K FASTPAFlat Head Socket Cap Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-13 x 31/2-13 x 3 flat socket cap screws 18-8 ss b18.2.1 b18.316
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Marine FastenersFLFlat Head Socket Cap Screw316, 317, A4 StainlessPlain5/8-11 x 35/8-11x3 flat soc c/s 316ss 316ss b18.2.1 b18.31690
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Marine FastenersFLFlat Head Socket Cap Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain3/4-10 x 33/4-10x3 flat soc cs ss b18.2.1 b18.31824
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Marine FastenersFLFlat Head Socket Cap Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain3/8-16 x 33/8-16x3 flat socket cap screw 18-8 ss 10 per small bag 5 small bags per master pack-generic brand b18.2.1 b18.3570
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General FMIFlat Head Socket Cap ScrewSteelPlain5/8-11 x 35/8-11x3 flat soc b18.2.1 b18.3200
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General FMIFlat Head Socket Cap ScrewSteelPlain3/8-16 x 33/8-16x3 flat soc es-0408 finish b18.2.1 b18.3920
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OSSCORIFlat Head Socket Cap ScrewSteelPlain#10-32 x 310-32x3 flat soc cap screw b18.2.1 b18.3184
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QFCTXFlat Head Socket Cap ScrewSteelPlain3/8-16 x 33/8-16x3 flat soc c/s alloy plain b18.2.1 b18.360
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QFCTXFlat Head Socket Cap ScrewSteelPlain7/8-9 x 37/8-9x3 flat soc c/s alloy plain b18.2.1 b18.320
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QFCTXFlat Head Socket Cap ScrewSteelPlain1/2-13 x 31/2-13x3 flat soc c/s plain b18.2.1 b18.358
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QFCTXFlat Head Socket Cap ScrewSteelZinc/Clear#10-32 x 310-32x3/8 flat s/c alloy zinc b18.2.1 b18.3154
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Bostwick INFlat Head Socket Cap ScrewSteelPlain3/4-10 x 33/4-10 x 3 flat soc cap screw (usa mfg) alloy b18.2.1 b18.320
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Bostwick INFlat Head Socket Cap ScrewSteelPlain3/8-24 x 33/8-24 x 3 flat soc cap screw alloy b18.2.1 b18.319
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Bostwick INFlat Head Socket Cap ScrewSteelPlain1/4-28 x 31/4-28 x 3 flat soc cap screw alloy b18.2.1 b18.350
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Bostwick INFlat Head Socket Cap Screw316, 317, A4 StainlessPlain1/4-20 x 31/4-20 x 3 flat soc cap screw 316 stainless b18.2.1 b18.312
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JET FITTINGCAFlat Head Socket Cap ScrewSteelPlain1/220 x 3cap screw flat socket 1/220x3 alloy steel b18.2.1 b18.375
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JET FITTINGCAFlat Head Socket Cap Screw316, 317, A4 StainlessPlain1/4-20 x 3cap screw flat hex socket 1/4-20x3 stainless steel 316 b18.2.1 b18.375
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WurthOntFlat Head Socket Cap ScrewSteelPlain3/8-16 x 3scr flt soc alloy 3/8-16x3 b18.2.1 b18.325
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JET FITTINGCAFlat Head Socket Cap ScrewSteelPlain1/2-13 x 3cap screw flat socket 1/213x3 alloy steel # r b18.2.1 b18.322
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THRDFASTFLFlat Head Socket Cap ScrewSteelPlain1/4-20 x 3flat socket c/s b18.2.1 b18.368
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THRDFASTFLFlat Head Socket Cap ScrewSteelPlain5/16-18 x 3flat socket c/s b18.2.1 b18.331
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THRDFASTFLFlat Head Socket Cap ScrewSteelPlain3/4-10 x 3flat socket c/s b18.2.1 b18.328
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THRDFASTFLFlat Head Socket Cap ScrewSteelPlain3/8-16 x 3flat socket c/s b18.2.1 b18.3 domestic11
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THRDFASTFLFlat Head Socket Cap ScrewSteelPlain7/8-9 x 3flat socket c/s b18.2.1 b18.32
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THRDFASTFLFlat Head Socket Cap ScrewSteelPlain5/8-11 x 3flat socket c/s b18.2.1 b18.31
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THRDFASTFLFlat Head Socket Cap Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-13 x 318-8 ss flat socket c/s b18.2.1 b18.31
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THRDFASTFLFlat Head Socket Cap ScrewSteelPlain7/16-14 x 3flat socket c/s b18.2.1 b18.32
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THRDFASTTNFlat Head Socket Cap ScrewSteelPlain3/8-16 x 3flat socket c/s b18.2.1 b18.370
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THRDFASTTNFlat Head Socket Cap ScrewSteelPlain5/8-11 x 3flat socket c/s b18.2.1 b18.336
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THRDFASTMSFlat Head Socket Cap ScrewSteelPlain1-8 x 3flat socket c/s b18.2.1 b18.32
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KBSTNFlat Head Socket Cap ScrewSteelZinc/Clear3/8-16 x 33/8-16 x 3 flat soc cap screw plated b18.2.1 b18.3188
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KBSTNFlat Head Socket Cap Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-13 x 31/2-13 x 3 flat soc cap screw s/s b18.2.1 b18.334
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THRDFASTALFlat Head Socket Cap ScrewSteelPlain5/8-11 x 3flat socket c/s b18.2.1 b18.390
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THRDFASTALFlat Head Socket Cap ScrewSteelPlain1/2-13 x 3flat socket c/s b18.2.1 b18.329
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THRDFASTALFlat Head Socket Cap ScrewSteelPlain5/8-11 x 3flat socket c/s b18.2.1 b18.365
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THRDFASTALFlat Head Socket Cap ScrewSteelPlain3/4-10 x 3flat socket c/s b18.2.1 b18.347
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THRDFASTOKFlat Head Socket Cap ScrewSteelPlain1/2-13 x 3flat socket c/s b18.2.1 b18.37
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THRDFASTFLFlat Head Socket Cap Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain3/8-16 x 318-8 ss flat socket c/s b18.2.1 b18.36
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THRDFASTOKFlat Head Socket Cap Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain3/8-16 x 318-8 ss flat socket c/s b18.2.1 b18.36
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THRDFASTALFlat Head Socket Cap ScrewSteelPlain1-8 x 3flat socket c/s b18.2.1 b18.329
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WSBKYFlat Head Socket Cap ScrewSteelPlain3/8-16 x 3screw flat soc alloy 3/8-16x3 b18.2.1 b18.35,801
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WSBKYFlat Head Socket Cap ScrewSteelPlain3/8-16 x 3screw flat soc alloy 3/8-16x3 b18.2.1 b18.32,100
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All SizeTXFlat Head Socket Cap Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain3/8-16 x 33/8-16 x 3 flat head socket cap screw-18-8 stainless b18.2.1 b18.31
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FACCAOntFlat Head Socket Cap ScrewSteelZinc/Clear1/4-20 x 3thread-cutting screw sq socket flat head type f 1/4-20 unc x 3 long low carb steel case hard zinc pl b18.2.1 b18.33,300
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