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1/2 Machine Screws (ASME B18. 6.3)

Machine Screws are uniformly threaded screws which are designed to be screwed into pre-drilled, pre-threaded holes, or in conjunction with a nut, usually with a diameter less than 1/4inch. Larger diameter machine screws with a hex head are usually referred to as machine bolts.

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SupplierLocTypeMaterialFinishSizeDescriptionQty 
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GLFOHMachine Screw316, 317, A4 StainlessPlain1/2-13 x 11/2-13x1 slotted flat m/s 316 s/s b18.6.3 () () ()6
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BHAMALMachine ScrewSteelZinc/Clear1/2-13 x 61/2-13x6 slotted round m/s zn b18.6.390
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BHAMALMachine Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-13 x 1 1/21/2-13x1 1/2 slotted flat m/s 300 ser ss b18.6.313
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AbabaCAMachine ScrewSteelPlain1/21/2 countersink 82 deg b18.6.34
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AbabaCAMachine ScrewSteelPlain1/21/2 countersink 82 deg b18.6.32
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StandardMAMachine ScrewSilicon BronzePlain1/2-13 x 3 1/21/2-13x3-1/2 slotted flat head machine screw silicon bronze b18.6.31138
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StandardMAMachine ScrewSilicon BronzePlain1/2-13 x 2 1/21/2-13x2-1/2 slotted flat head machine screw silicon bronze b18.6.3609
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StandardMAMachine ScrewSilicon BronzePlain1/2-13 x 21/2-13x2 slotted flat head machine screw silicon bronze b18.6.3455
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StandardMAMachine ScrewBrassPlain1/2-13 x 21/2-13x2 phillips flat head machine screw brass b18.6.31160
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StandardMAMachine ScrewBrassPlain1/2-13 x 1 1/21/2-13x1-1/2 phillips flat head machine screw brass b18.6.31157
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StandardMAMachine Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-13 x 11/2-13x1 slotted flat head machine screw 18-8 stainless steel b18.6.32715
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StandardMAMachine Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-13 x 1 1/41/2-13x1-1/4 slotted flat head machine screw 18-8 stainless steel b18.6.31831
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StandardMAMachine ScrewBrassPlain1/2-13 x 1 1/41/2-13x1-1/4 phillips flat head machine screw brass b18.6.31249
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StandardMAMachine ScrewBrassPlain1/2-13 x 11/2-13x1 phillips flat head machine screw brass b18.6.3367
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StandardMAMachine Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-13 x 3/41/2-13x3/4 slotted flat head machine screw 18-8 stainless steel b18.6.32763
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StandardMAMachine Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-13 x 11/2-13x1 slotted round head machine screw 18-8 stainless steel b18.6.3908
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StandardMAMachine Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-13 x 1 3/41/2-13x1-3/4 slotted flat head machine screw 18-8 stainless steel b18.6.374
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StandardMAMachine Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-13 x 1 1/21/2-13x1-1/2 slotted round head machine screw 18-8 stainless steel b18.6.356
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QFCTXMachine ScrewSteelZinc/Clear1/2-13 x 1 1/41/2-13x1 1/4 hwh m/s serrated zinc b18.6.3300
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QFCTXMachine Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-13 x 1 1/21/2-13x1-1/2 slotted round head m/s 18-8 b18.6.31
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J&L INMachine Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-13 x 21/2-13 X 2 STAINLESS FLAT HD M/S SLOTTED b18.6.3209
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CascadeORMachine ScrewBrassPlain1/2-13 x 2flat slotted b18.6.3220
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CascadeORMachine ScrewBrassPlain1/2-13 x 1 1/2slotted flat b18.6.31200
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B & K FASTPAMachine ScrewSteelZinc/Clear1/2-13 x 61/2-13 x 6 slotted flat machine screws zinc b18.6.31
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B & K FASTPAMachine Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-13 x 1 3/41/2-13 x 1 3/4 slotted flat machine screw 18-8 ss b18.6.373
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BHAMALMachine ScrewSteelZinc/Clear1/2-13 x 31/2-13x3 round slotted m/s zinc b18.6.38
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OSSCORIMachine ScrewSteelZinc/Clear1/2-13 x 11/2-13x1 slotted round m/s plated b18.6.357
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OSSCORIMachine ScrewSteelZinc/Clear1/2-13 x 1 1/41/2-13x1 1/4 slotted flat m/s plated b18.6.3232
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OSSCORIMachine Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-13 x 1 1/21/2-13x1 1/2 slotted flat m/s 18-8 304 b18.6.320
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OSSCORIMachine ScrewSteelZinc/Clear1/2-13 x 41/2-13x4 slotted round m/s plated b18.6.32
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OSSCORIMachine ScrewSteelZinc/Clear1/2-13 x 61/2-13x6 slotted round m/s plated b18.6.321
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OSSCORIMachine Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-13 x 21/2-13x2 slotted flat m/s 18-8 304 b18.6.323
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QFCTXMachine ScrewSteelZinc/Clear1/2 x 61/2x6 round slotted m/s zinc b18.6.3240
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THRDFASTFLMachine ScrewSteelZinc/Clear1/2-13 x 3/4slotted flat m/s b18.6.3246
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THRDFASTFLMachine ScrewSteelZinc/Clear1/2-13 x 1slotted round m/s b18.6.3286
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THRDFASTFLMachine Screw316, 317, A4 StainlessPlain1/2-13 x 1 3/4t-316 ss slotted flat m/s b18.6.3116
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THRDFASTFLMachine ScrewSteelZinc/Clear1/2-13 x 6slotted round m/s b18.6.3109
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THRDFASTFLMachine Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-13 x 8 1/218-8 ss slotted flat m/s b18.6.399
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THRDFASTFLMachine ScrewBrassPlain1/2-13 x 3/4slotted flat m/s b18.6.346
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THRDFASTFLMachine ScrewSteelZinc/Clear1/2-13 x 2slotted round m/s b18.6.336
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THRDFASTFLMachine Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-13 x 2 1/218-8 ss slotted flat m/s b18.6.323
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THRDFASTFLMachine ScrewSteelZinc/Clear1/2-13 x 4slotted flat m/s b18.6.320
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THRDFASTFLMachine Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-13 x 1 1/418-8 ss slotted flat m/s b18.6.317
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THRDFASTFLMachine ScrewSteelZinc/Clear1/2-13 x 4slotted round m/s b18.6.313
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THRDFASTFLMachine ScrewSteelZinc/Clear1/2-13 x 5slotted flat m/s b18.6.33
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THRDFASTFLMachine Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-13 x 1 1/218-8 ss slotted flat m/s b18.6.31
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THRDFASTFLMachine Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-13 x 318-8 ss slotted flat m/s b18.6.31
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THRDFASTFLMachine ScrewSteelZinc/Clear1/2-13 x 1 1/2slotted flat m/s b18.6.31
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THRDFASTFLMachine ScrewSteelZinc/Clear1/2-13 x 3/4slotted truss m/s b18.6.350
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THRDFASTOKMachine Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-13 x 318-8 ss slotted flat m/s b18.6.315
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THRDFASTALMachine ScrewSteelCadmium1/2-13 x 2slotted flat m/s b18.6.3 domestic3
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THRDFASTOKMachine ScrewSteelZinc/Clear1/2-13 x 2slotted flat m/s domestic b18.6.3339
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THRDFASTALMachine Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-13 x 1 3/418-8 ss slotted flat m/s b18.6.39
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MMFMIMachine ScrewSteelCadmium/Yellow1/2-13 x 1 1/41/2-13 x 1-1/4 phil flat stl/cad machine screw w patch usa ms35190-343l b18.6.3110
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QFSMIMachine ScrewBrassPlain1/2-13 x 1 3/4slotted flat head b18.6.315
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QFSMIMachine ScrewBrassPlain1/2-13 x 1 1/4slotted flat head b18.6.323
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QFSMIMachine ScrewBrassPlain1/2-13 x 2 1/2slotted flat head b18.6.341
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QFSMIMachine ScrewBrassPlain1/2-13 x 3slotted flat head b18.6.315
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