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1/2-13 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.
91 results, (click on any line for more information)
| Search Results Sponsored by ISSCO, Inc., your source for Machine Screws. For more results, visit isscoinc.com | ||||||||
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| Supplier | Loc | Type | Material | Finish | Size | Description | Qty | |
| Buy Machine Screws from one of our FCH Network Members | ||||||||
| THRDFAST | FL | Machine Screw | Steel | Zinc/Clear | 1/2-13 x 3/4 | slotted flat m/s b18.6.3 | 246 |
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| THRDFAST | FL | Machine Screw | Brass | Plain | 1/2-13 x 3/4 | slotted flat m/s b18.6.3 | 46 |
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| THRDFAST | FL | Machine Screw | Steel | Zinc/Clear | 1/2-13 x 3/4 | slotted truss m/s b18.6.3 | 50 |
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| Standard | MA | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/2-13 x 3/4 | 1/2-13x3/4 slotted flat head machine screw 18-8 stainless steel b18.6.3 | 2763 |
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| THRDFAST | AL | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/2-13 x 3/4 | 18-8 ss slotted flat m/s b18.6.3 | 30 |
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| GLF | OH | Machine Screw | 316, 317, A4 Stainless | Plain | 1/2-13 x 1 | 1/2-13x1 slotted flat m/s 316 s/s b18.6.3 () () | 6 |
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| THRDFAST | FL | Machine Screw | Steel | Zinc/Clear | 1/2-13 x 1 | slotted round m/s b18.6.3 | 286 |
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| Marine Fasteners | FL | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/2-13 x 1 | 1/2-13 x 1 slotted flat ms ss b18.6.3 | 408 |
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| Standard | MA | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/2-13 x 1 | 1/2-13x1 slotted flat head machine screw 18-8 stainless steel b18.6.3 | 2715 |
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| Standard | MA | Machine Screw | Brass | Plain | 1/2-13 x 1 | 1/2-13x1 phillips flat head machine screw brass b18.6.3 | 367 |
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| Standard | MA | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/2-13 x 1 | 1/2-13x1 slotted round head machine screw 18-8 stainless steel b18.6.3 | 908 |
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| OSSCO | RI | Machine Screw | Steel | Zinc/Clear | 1/2-13 x 1 | 1/2-13x1 slotted round m/s plated b18.6.3 | 57 |
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| Bostwick | IN | Machine Screw | Brass | Plain | 1/2-13 x 1 | 1/2-13 x 1 slotted flat m/s brass b18.6.3 | 50 |
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| THRDFAST | FL | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/2-13 x 1 | 18-8 ss slotted flat m/s b18.6.3 | 7 |
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| QFC | TX | Machine Screw | Steel | Zinc/Clear | 1/2-13 x 1 1/4 | 1/2-13x1 1/4 hwh m/s serrated zinc b18.6.3 | 300 |
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| QFS | MI | Machine Screw | Brass | Plain | 1/2-13 x 1 1/4 | slotted flat head b18.6.3 | 23 |
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| THRDFAST | FL | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/2-13 x 1 1/4 | 18-8 ss slotted flat m/s b18.6.3 | 17 |
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| Marine Fasteners | FL | Machine Screw | 316, 317, A4 Stainless | Plain | 1/2-13 x 1 1/4 | 1/2-13 x 1 1/4 slt flat ms 316 b18.6.3 | 1680 |
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| Standard | MA | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/2-13 x 1 1/4 | 1/2-13x1-1/4 slotted flat head machine screw 18-8 stainless steel b18.6.3 | 1831 |
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| Standard | MA | Machine Screw | Brass | Plain | 1/2-13 x 1 1/4 | 1/2-13x1-1/4 phillips flat head machine screw brass b18.6.3 | 1249 |
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| MMF | MI | Machine Screw | Steel | Cadmium/Yellow | 1/2-13 x 1 1/4 | 1/2-13 x 1-1/4 phil flat stl/cad machine screw w patch usa ms35190-343l b18.6.3 | 110 |
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| OSSCO | RI | Machine Screw | Steel | Zinc/Clear | 1/2-13 x 1 1/4 | 1/2-13x1 1/4 slotted flat m/s plated b18.6.3 | 232 |
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| THRDFAST | OK | Machine Screw | Steel | Galvanized | 1/2-13 x 1 1/4 | slotted flat m/s hdg b18.6.3 | 11 |
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| THRDFAST | AL | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/2-13 x 1 1/4 | 18-8 ss slotted flat m/s b18.6.3 | 97 |
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| THRDFAST | FL | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/2-13 x 1 1/4 | 18-8 ss slotted flat m/s b18.6.3 | 5 |
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| THRDFAST | MS | Machine Screw | Brass | Plain | 1/2-13 x 1 1/4 | slotted flat m/s b18.6.3 | 6 |
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| QFC | TX | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/2-13 x 1 1/2 | 1/2-13x1-1/2 slotted round head m/s 18-8 b18.6.3 | 1 |
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| Marine Fasteners | FL | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/2-13 x 1 1/2 | 1/2-13x1-1/2 slotted flat ms ss b18.6.3 | 1014 |
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| Marine Fasteners | FL | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/2-13 x 1 1/2 | 1/2-13x1-1/2 phil flat ms 18-8 b18.6.3 | 763 |
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| Cascade | OR | Machine Screw | Brass | Plain | 1/2-13 x 1 1/2 | slotted flat b18.6.3 | 1200 |
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| THRDFAST | FL | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/2-13 x 1 1/2 | 18-8 ss slotted flat m/s b18.6.3 | 1 |
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| THRDFAST | FL | Machine Screw | Steel | Zinc/Clear | 1/2-13 x 1 1/2 | slotted flat m/s b18.6.3 | 1 |
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| Standard | MA | Machine Screw | Brass | Plain | 1/2-13 x 1 1/2 | 1/2-13x1-1/2 phillips flat head machine screw brass b18.6.3 | 1157 |
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| Standard | MA | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/2-13 x 1 1/2 | 1/2-13x1-1/2 slotted round head machine screw 18-8 stainless steel b18.6.3 | 56 |
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| BHAM | AL | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/2-13 x 1 1/2 | 1/2-13x1 1/2 slotted flat m/s 300 ser ss b18.6.3 | 13 |
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| OSSCO | RI | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/2-13 x 1 1/2 | 1/2-13x1 1/2 slotted flat m/s 18-8 304 b18.6.3 | 20 |
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| THRDFAST | FL | Machine Screw | Brass | Plain | 1/2-13 x 1 1/2 | slotted round m/s b18.6.3 | 19 |
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| THRDFAST | AL | Machine Screw | 316, 317, A4 Stainless | Plain | 1/2-13 x 1 1/2 | t-316 ss slotted flat m/s b18.6.3 | 5 |
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| B & K FAST | PA | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/2-13 x 1 3/4 | 1/2-13 x 1 3/4 slotted flat machine screw 18-8 ss b18.6.3 | 73 |
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| QFS | MI | Machine Screw | Brass | Plain | 1/2-13 x 1 3/4 | slotted flat head b18.6.3 | 15 |
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| THRDFAST | FL | Machine Screw | 316, 317, A4 Stainless | Plain | 1/2-13 x 1 3/4 | t-316 ss slotted flat m/s b18.6.3 | 116 |
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| Marine Fasteners | FL | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/2-13 x 1 3/4 | 1/2-13 x 1-3/4 slotted flat ms ss b18.6.3 | 2310 |
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| Standard | MA | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/2-13 x 1 3/4 | 1/2-13x1-3/4 slotted flat head machine screw 18-8 stainless steel b18.6.3 | 74 |
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| Bostwick | IN | Machine Screw | Grade 5 | Plain | 1/2-13 x 1 3/4 | 1/2-13 x 1 3/4 slotted flat m/s gr 5 b18.6.3 | 11 |
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| THRDFAST | AL | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/2-13 x 1 3/4 | 18-8 ss slotted flat m/s b18.6.3 | 9 |
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| Marine Fasteners | FL | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/2-13 x 2 | 1/2-13x2 slotted flat ms ss b18.6.3 | 2343 |
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| Cascade | OR | Machine Screw | Brass | Plain | 1/2-13 x 2 | flat slotted b18.6.3 | 220 |
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| THRDFAST | FL | Machine Screw | Steel | Zinc/Clear | 1/2-13 x 2 | slotted round m/s b18.6.3 | 36 |
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| Marine Fasteners | FL | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Chrome | 1/2-13 x 2 | 1/2-13 x 2 phil flat ms 18-8ss/bright chrome b18.6.3 | 1286 |
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| Standard | MA | Machine Screw | Silicon Bronze | Plain | 1/2-13 x 2 | 1/2-13x2 slotted flat head machine screw silicon bronze b18.6.3 | 455 |
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| Standard | MA | Machine Screw | Brass | Plain | 1/2-13 x 2 | 1/2-13x2 phillips flat head machine screw brass b18.6.3 | 1160 |
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| THRDFAST | AL | Machine Screw | Steel | Cadmium | 1/2-13 x 2 | slotted flat m/s b18.6.3 domestic | 3 |
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| OSSCO | RI | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/2-13 x 2 | 1/2-13x2 slotted flat m/s 18-8 304 b18.6.3 | 23 |
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| J&L | IN | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/2-13 x 2 | 1/2-13 X 2 STAINLESS FLAT HD M/S SLOTTED b18.6.3 | 209 |
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| THRDFAST | OK | Machine Screw | Steel | Zinc/Clear | 1/2-13 x 2 | slotted flat m/s domestic b18.6.3 | 339 |
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| THRDFAST | AL | Machine Screw | Steel | Zinc/Clear | 1/2-13 x 2 | slotted round m/s b18.6.3 | 39 |
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| QFS | MI | Machine Screw | Brass | Plain | 1/2-13 x 2 1/2 | slotted flat head b18.6.3 | 41 |
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| THRDFAST | FL | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/2-13 x 2 1/2 | 18-8 ss slotted flat m/s b18.6.3 | 23 |
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| Marine Fasteners | FL | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/2-13 x 2 1/2 | 1/2-13 x 2-1/2 slotted flat ms ss b18.6.3 | 630 |
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| Marine Fasteners | FL | Machine Screw | 316, 317, A4 Stainless | Plain | 1/2-13 x 2 1/2 | 1/2-13 x 2-1/2 sl flat ms 316 b18.6.3 | 590 |
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| Standard | MA | Machine Screw | Silicon Bronze | Plain | 1/2-13 x 2 1/2 | 1/2-13x2-1/2 slotted flat head machine screw silicon bronze b18.6.3 | 609 |
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| Bostwick | IN | Machine Screw | Steel | Zinc/Clear | 1/2-13 x 2 3/4 | 1/2-13 x 2 3/4 slotted flat m/s zinc b18.6.3 | 55 |
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| Marine Fasteners | FL | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/2-13 x 3 | 1/2-13x3 slotted flat ms ss b18.6.3 | 1055 |
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| QFS | MI | Machine Screw | Brass | Plain | 1/2-13 x 3 | slotted flat head b18.6.3 | 15 |
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| THRDFAST | FL | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/2-13 x 3 | 18-8 ss slotted flat m/s b18.6.3 | 1 |
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| THRDFAST | OK | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/2-13 x 3 | 18-8 ss slotted flat m/s b18.6.3 | 15 |
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| Bostwick | IN | Machine Screw | Steel | Zinc/Clear | 1/2-13 x 3 | 1/2-13 x 3 slotted flat m/s zinc b18.6.3 | 25 |
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| BHAM | AL | Machine Screw | Steel | Zinc/Clear | 1/2-13 x 3 | 1/2-13x3 round slotted m/s zinc b18.6.3 | 8 |
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| THRDFAST | MS | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/2-13 x 3 | 18-8 ss slotted round m/s b18.6.3 | 9 |
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| THRDFAST | AL | Machine Screw | Steel | Zinc/Clear | 1/2-13 x 3 | slotted round m/s b18.6.3 | 6 |
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| Marine Fasteners | FL | Machine Screw | Silicon Bronze | Plain | 1/2-13 x 3 1/2 | 1/2-13x3-1/2 slotted fl ms 655brz b18.6.3 | 1487 |
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| Marine Fasteners | FL | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/2-13 x 3 1/2 | 1/2-13x3-1/2 slotted flat ms ss b18.6.3 | 910 |
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| Standard | MA | Machine Screw | Silicon Bronze | Plain | 1/2-13 x 3 1/2 | 1/2-13x3-1/2 slotted flat head machine screw silicon bronze b18.6.3 | 1138 |
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| THRDFAST | MS | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/2-13 x 3 1/2 | 18-8 ss slotted flat m/s b18.6.3 | 10 |
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| THRDFAST | FL | Machine Screw | Steel | Zinc/Clear | 1/2-13 x 4 | slotted flat m/s b18.6.3 | 20 |
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| THRDFAST | FL | Machine Screw | Steel | Zinc/Clear | 1/2-13 x 4 | slotted round m/s b18.6.3 | 13 |
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| OSSCO | RI | Machine Screw | Steel | Zinc/Clear | 1/2-13 x 4 | 1/2-13x4 slotted round m/s plated b18.6.3 | 2 |
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| Marine Fasteners | FL | Machine Screw | Silicon Bronze | Plain | 1/2-13 x 5 | 1/2-13x5 slotted flat head m/s silicon bronze bulk-generic brand b18.6.3 | 155 |
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| Marine Fasteners | FL | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/2-13 x 5 | 1/2-13x5 slotted flat head machine screw 18-8ss b18.6.3 | 1575 |
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| Marine Fasteners | FL | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/2-13 x 5 | 1/2-13x5 slotted flat head m/s 18-8 ss 1 per small bag 5 small bags per master pack-generic brand b18.6.3 | 117 |
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| THRDFAST | FL | Machine Screw | Steel | Zinc/Clear | 1/2-13 x 5 | slotted flat m/s b18.6.3 | 3 |
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| JET FITTING | CA | Machine Screw | Steel | Plain | 1/2-13 x 5 | 1/2-13x5 ms round sltzn 583991 b18.6.3 | 25 |
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| B & K FAST | PA | Machine Screw | Steel | Zinc/Clear | 1/2-13 x 6 | 1/2-13 x 6 slotted flat machine screws zinc b18.6.3 | 1 |
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| Marine Fasteners | FL | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/2-13 x 6 | 1/2-13x6 slotted flat ms ss b18.6.3 | 980 |
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| THRDFAST | FL | Machine Screw | Steel | Zinc/Clear | 1/2-13 x 6 | slotted round m/s b18.6.3 | 109 |
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| BHAM | AL | Machine Screw | Steel | Zinc/Clear | 1/2-13 x 6 | 1/2-13x6 slotted round m/s zn b18.6.3 | 90 |
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| OSSCO | RI | Machine Screw | Steel | Zinc/Clear | 1/2-13 x 6 | 1/2-13x6 slotted round m/s plated b18.6.3 | 21 |
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| Bostwick | IN | Machine Screw | Steel | Zinc/Clear | 1/2-13 x 6 | 1/2-13 x 6 slotted flat m/s zinc b18.6.3 | 25 |
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| THRDFAST | AL | Machine Screw | Steel | Zinc/Clear | 1/2-13 x 6 | slotted round m/s b18.6.3 | 5 |
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| Marine Fasteners | FL | Machine Screw | Silicon Bronze | Plain | 1/2-13 x 8 | 1/2-13 x 8 slotted flat m/s sil brz bulk-generic brand b18.6.3 | 47 |
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| THRDFAST | FL | Machine Screw | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 1/2-13 x 8 1/2 | 18-8 ss slotted flat m/s b18.6.3 | 99 |
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