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5/16 Machine Keys
Machine Keys, or Parallel keys are made from hardened rod with a machined square or rectangular cross section, and are the most common type of key. They are installed into keyways to transmit torque from shafts to gears and other components. They are called “keys” because they lock a component to the shaft by means of a corresponding keyway in a shaft.
49 results, (click on any line for more information)
| Buy Machine Keys from one of our FCH Network Members | ||||||||
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| Supplier | Loc | Type | Material | Finish | Size | Description | Qty | |
| Jackson | MS | Machine Key (Square & Rectangular) | Steel | Plain | 5/16 x 3/8 x 12 | key machine rectangle | 12 |
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| Jackson | MS | Machine Key (Square & Rectangular) | Steel | Plain | 5/16 x 1/2 x 12 | key machine rectangle | 3 |
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| Jackson | MS | Machine Key (Square & Rectangular) | Steel | Plain | 5/16 x 1 | key machine square | 263 |
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| Endries | WI | Machine Key (Square & Rectangular) | Plain | 5/16 x 2 5/8 | 5/16x2-5/8 square machine key undersized plain | 350 |
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| Endries | WI | Machine Key (Square & Rectangular) | Plain | 5/16 x 1 1/2 | 5/16x1-1/2 1045 square machine key plain undersized | 526 |
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| Endries | WI | Machine Key (Square & Rectangular) | Plain | 5/16 x 2 5/8 | 5/16 x 2 5/8 sq machine key c1018 | 353 |
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| Endries | WI | Machine Key (Square & Rectangular) | Steel | Plain | 5/16 x 2 1/4 | 5/16x2-1/4 1045 heat treat undersized square machine key plain | 1817 |
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| SWACO | OH | Machine Key (Square & Rectangular) | Steel | Plain | 5/16 x 5/16 x 12 | sq key 5/16x5/16x12 cs pln | 4 |
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| SWACO | OH | Machine Key (Square & Rectangular) | Steel | Plain | 5/16 x 5/16 x 1 | 5/16x5/16x1 cut key | 39 |
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| NAPPCO | TX | Machine Key (Square & Rectangular) | Steel | Zinc/Clear | 5/16 x 5/16 x 36 | 5/16 x 5/16 x 36 square key zp rohs | 2 |
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| Endries | WI | Machine Key (Square & Rectangular) | Steel | Plain | 5/16 x 3 | 5/16x3 square machine key undersized plain | 120 |
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| Endries | WI | Machine Key (Square & Rectangular) | Steel | Plain | 5/16 x 3/8 x 5 1/2 | 5/16x3/8x5-1/2 rectangular machine key | 49 |
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| NutsBolts | NE | Machine Key (Square & Rectangular) | Steel | Plain | 5/16 | 5/16 square snap wire pin | 353 |
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| Liberty | IL | Machine Key (Square & Rectangular) | Steel | Zinc/Clear | 5/16 x 12 | square key zinc | 5 |
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| Liberty | IL | Machine Key (Square & Rectangular) | Steel | Plain | 5/16 x 2 | square key | 15 |
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| Liberty | IL | Machine Key (Square & Rectangular) | Steel | Plain | 5/16 x 1 1/2 | long special square key with .039 chamer on 2 corners per print per print | 200 |
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| Hodell | OH | Machine Key (Square & Rectangular) | Steel | Plain | 5/16 x 5/16 x 1 5/8 | 5/16 x 5/16 x 1-5/8 square key carbonsteel undersize | 2000 |
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| Field Fas | IL | Machine Key (Square & Rectangular) | Steel | Plain | 5/16 x 2 1/8 | 5/16 x 2 1/8 square key undersize stl pln | 50 |
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| Endries | WI | Machine Key (Square & Rectangular) | Steel | Plain | 5/16 x 2 | 5/16x2 square machine key undersized plain | 150 |
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| Endries | WI | Machine Key (Square & Rectangular) | Steel | Plain | 5/16x1-3/4 square machine key undersized plain | | 65 |
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| Endries | WI | Machine Key (Square & Rectangular) | Steel | Plain | 5/16 x 3 sq machine key type-a | 298 |
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| Wurth Ind | IN | Machine Key (Square & Rectangular) | Steel | Plain | 5/16 x 5/16 x 1 1/4 | key mach b us 1018 pl 5/16x5/16x1 1/4 steel plain | 245 |
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| Wurth Ind | IN | Machine Key (Square & Rectangular) | Steel | Plain | 5/16 x 5/16 x 2 | key mach b us 1018 pl 5/16x5/16x2 steel plain | 227.75 |
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| Wurth Ind | IN | Machine Key (Square & Rectangular) | Steel | Plain | 5/16 x 5/16 x 1 | key mach b us 1018 pl 5/16x5/16x1 steel plain | 1711 |
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| National | Ont | Machine Key (Square & Rectangular) | Steel | Plain | 5/16 x 5/16 x 3 | sq key ms20068-203 5/16 x5/16 x3 | 2 |
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| WINA | MN | Machine Key (Square & Rectangular) | Aluminum | Plain | 5/16 x 5/16 x 1 | key mach b us 1018 pl 5/16x5/16x1 | 1711 |
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| WINA | MN | Machine Key (Square & Rectangular) | Aluminum | Plain | 5/16 x 5/16 x 1 1/4 | key mach b us 1018 pl 5/16x5/16x1 1/4 | 245 |
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| WINA | MN | Machine Key (Square & Rectangular) | Aluminum | Plain | 5/16 x 5/16 x 2 | key mach b us 1018 pl 5/16x5/16x2 | 227.75 |
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| Mansco | MI | Machine Key (Square & Rectangular) | Steel | Plain | 5/16 x 5/16 x 4-1/8 square key pln | 160 |
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| Mansco | MI | Machine Key (Square & Rectangular) | Steel | Plain | 5/16 x 5/16 x 2 square key pln | 140 |
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| Mansco | MI | Machine Key (Square & Rectangular) | Steel | Plain | 5/16 x 5/16 x 4 1/8 5 | 5/16x5/16x4-1/8 square key pln 5/bag | 51 |
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| Mansco | MI | Machine Key (Square & Rectangular) | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 5/16 x 5/16 x 1-1/2 square key 18-8 s.s. | 101 |
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| Field Fas | IL | Machine Key (Square & Rectangular) | Steel | Plain | 5/16 x 3/8 x 2 1/4 rectangular key undersize stl pln | 188 |
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| MidStates | MI | Machine Key (Square & Rectangular) | Steel | Plain | 5/16 x 5/16 | machinery key-both ends rnd | 2 |
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| MidStates | MI | Machine Key (Square & Rectangular) | Steel | Plain | 5/16 x 5/16 | machinery key-both ends rnd | 3 |
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| IPC | VA | Machine Key (Square & Rectangular) | Steel | Plain | 5/16 x 1 11/16 | 5/16x1 11/16 sq. key one end rnd. c of c req. (jg1-5/16x27) per mes-0007 spec | 196 |
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| WDMB | IA | Machine Key (Square & Rectangular) | Steel | Plain | 5/16 x 5/16 x 2 | key mach us sq b 5/16x5/16x2 | 315 |
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| WDMB | IA | Machine Key (Square & Rectangular) | Steel | Plain | 5/16 x 2 3/4 | key gib st 1018 (pl) 5/16x2 3/4 drw (W0S0) | 292 |
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| ISSCO | MO | Machine Key (Square & Rectangular) | Grade 2 | Plain | 5/16 x 5/16 x 1 1/2 | square-.001/.000 | 800 |
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| ISSCO | MO | Machine Key (Square & Rectangular) | Grade 2 | Plain | 5/16 x 5/16 x 1 1/4 | square-.001/.000 | 750 |
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| ISSCO | MO | Machine Key (Square & Rectangular) | Grade 2 | Plain | 5/16 x 5/16 x 2 | square +.001/.000 | 2685 |
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| ISSCO | MO | Machine Key (Square & Rectangular) | Grade 2 | Plain | 5/16 x 5/16 x 2 1/2 | square +.001/.000 | 800 |
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| ISSCO | MO | Machine Key (Square & Rectangular) | Steel | Plain | 5/16 x 1 1/4 | gib head key 5/16 taper | 505 |
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| ISSCO | MO | Machine Key (Square & Rectangular) | Steel | Plain | 5/16 x 1 3/4 | gib head key 5/16 taper | 450 |
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| ISSCO | MO | Machine Key (Square & Rectangular) | Steel | Plain | 5/16 x 1 1/2 | gib head key 5/16 taper | 2440 |
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| ISSCO | MO | Machine Key (Square & Rectangular) | Steel | Plain | 5/16 x 2 3/4 | gib head key 5/16 taper | 455 |
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| PENCOM | Ont | Machine Key (Square & Rectangular) | Steel | Plain | 5/16 x 5/16 x 2 | 5/16x5/16x2 machine key stl pln | 80 |
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| OBRIEN | OH | Machine Key (Square & Rectangular) | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 5/16 x 5/16 x 1' | 5/16 x 5/16 x 1 ft kystk s/s | 2 |
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| Wurth | IN | Machine Key (Square & Rectangular) | Steel | Plain | 5/16 x 5/16 x 1 1/2 | 5/16 x 5/16 x 1-1/2 gib head key steel 522725 | 230 |
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