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4 1/2 inch length 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.

29 results, (click on any line for more information)
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SupplierLocTypeMaterialFinishSizeDescriptionQty 
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AbabaCAMachine Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#10-32 x 4 1/210-32 x 4 1/2 inch p-pan m-scr s/s b18.6.3240
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AbabaCAMachine Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/4-20 x 4 1/21/4-20 x 4 1/2 phil-pan mach screw s/s b18.6.336
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AbabaCAMachine ScrewSteelZinc/Clear#10-24 x 4 1/210-24 x 4 1/2 s-rnd m/s stl znc b18.6.316
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JET FITTINGCAMachine ScrewSteelZinc/Clear3/8-16 x 4 1/23/8-16x4 1/2 ms flat phillips zn 586795 b18.6.3149
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JET FITTINGCAMachine ScrewSteelPlain1/4-20 x 4 1/21/4-20x4 1/2 ms round sltzn 583689 b18.6.3191
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StandardMAMachine Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/16-18 x 4 1/25/16-18x4-1/2 phillips flat head machine screw 18-8 stainless steel b18.6.34548
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StandardMAMachine Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/4-20 x 4 1/21/4-20x4-1/2 slotted round head machine screw 18-8 stainless steel b18.6.3-495
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StandardMAMachine Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/16-18 x 4 1/25/16-18x4-1/2 slotted round head machine screw 18-8 stainless steel b18.6.31847
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StandardMAMachine Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/4-20 x 4 1/21/4-20x4-1/2 slotted flat head machine screw 18-8 stainless steel b18.6.32710
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StandardMAMachine Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain#10-24 x 4 1/210-24x4-1/2 slotted round head machine screw 18-8 stainless steel b18.6.35000
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StandardMAMachine Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain3/8-16 x 4 1/23/8-16x4-1/2 phillips flat head machine screw 18-8 stainless steel b18.6.31450
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QFCTXMachine ScrewSteelZinc/Yellow#10-32 x 4 1/210-32x4 1/2 indented hex m/s zinc/yellow b18.6.3557
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B & K FASTPAMachine ScrewSteelZinc/Clear5/16-18 x 4 1/25/16-18 x 4 1/2 slotted flat machine screws zinc b18.6.3554
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B & K FASTPAMachine Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/4-20 x 4 1/21/4-20 x 4 1/2 slotted rnd machine screws 18-8 ss b18.6.3306
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Marine FastenersFLMachine Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/4-20 x 4 1/21/4-20x4-1/2 square oval ms ss b18.6.36000
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Marine FastenersFLMachine Screw316, 317, A4 StainlessPlain1/4-20 x 4 1/21/4-20x4-1/2 phillips pn ms 316ss 316ss b18.6.32600
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Marine FastenersFLMachine Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/4-20 x 4 1/21/4-20x4 1/2 square truss ms ss low contour b18.6.33000
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Marine FastenersFLMachine Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/16-18 x 4 1/25/16-18x4-1/2 phil pan ms ss b18.6.31198
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Marine FastenersFLMachine Screw300 Stainless (A1,A2, 18-8,304,310 etc.)Plain3/8-16 x 4 1/23/8-16 x 4 1/2 phil flat m/s 18-8 ss 5 per small bag 5 small bags per master pack-generic brand b18.6.3800
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OSSCORIMachine ScrewSteelZinc/Clear3/8-16 x 4 1/23/8-16x4 1/2 slotted round m/s plated b18.6.321
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QFCTXMachine ScrewSteelPlain1/4 x 4 1/21/4x4-1/2 rd hd mach screw b18.6.375
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JET FITTINGCAMachine ScrewSteelZinc/Clear3/8-16 x 4 1/23/8-16x4 1/2 (ft) flat head phil screws machine screws machine screw flat head phillips zinc cr+3 (inch) b18.6.3150
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JET FITTINGCAMachine ScrewSteelZinc/Clear1/4-20 x 4 1/2machine screw round slotted 1/420x4-1/2 steel zinc b18.6.3200
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THRDFASTFLMachine ScrewSteelZinc/Clear5/16-18 x 4 1/2slotted flat m/s b18.6.369
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THRDFASTFLMachine ScrewSteelZinc/Clear5/16-18 x 4 1/2phil flat m/s b18.6.364
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THRDFASTTNMachine ScrewSteelZinc/Clear1/4-20 x 4 1/21/4-20x4-1/2 phil flat m/s b18.6.3750
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KBSTNMachine ScrewSteelZinc/Clear5/16-18 x 4 1/25/16-18 x 4 1/2 slotted round m/s pltd b18.6.3977
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All SizeTXMachine ScrewSteelZinc/Clear5/16-18 x 4 1/25/16-18 x 4 1/2 flat phillip machine screw zinc b18.6.3383
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DavisILMachine ScrewSteelZinc/Clear#10-24 x 4 1/2#10-24 x 4-1/2 sltd. round m/s-steel zinc b18.6.3100
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