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Machine Keys
Machine Keys, or Straight 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.
1,774 Machine Key (Square & Rectangular), showing 200, (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 | 3/16 x 1 1/4 | key machine square | 43 |
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| Jackson | MS | Machine Key (Square & Rectangular) | Steel | Plain | 5/16 x 3/8 x 12 | key machine rectangle | 26 |
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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 | 3/8 x 5/8 x 12 | key machine rectangle | 6 |
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| Jackson | MS | Machine Key (Square & Rectangular) | Steel | Plain | 1/2 x 3/4 x 12 | 1/2 x 3/4 x 12 key machine rectangle high carbon steel bilateral astm a29 plain finish | 9 |
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| MAINSOURC | NH | Machine Key (Square & Rectangular) | Steel | Plain | M4 x 4 x 20 | m4 x 4 x 20 din 6885a parallel key st | 150 |
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| MAINSOURC | NH | Machine Key (Square & Rectangular) | Steel | Plain | M5 x 5 x 32 | m5 x 5 x 32 din 6885a shaft key st | 46 |
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| YANKEE | NH | Machine Key (Square & Rectangular) | Steel | Plain | M4 x 4 x 20 | m4 x 4 x 20 parallel key w/round end-plain | 50 |
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| Endries | WI | Machine Key (Square & Rectangular) | Steel | Plain | 3/8 x 1 1/2 | 3/8x1-1/2 square machine key +.001/-.000 | 425 |
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| Endries | WI | Machine Key (Square & Rectangular) | Steel | Plain | 1/4 x 1 | 1/4x1 c1018 square machine key undersized plain | 600 |
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| Endries | WI | Machine Key (Square & Rectangular) | Steel | Plain | 3/16 x 1 3/4 | 3/16x1-3/4 square machine key undersized plain | 2226 |
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| Endries | WI | Machine Key (Square & Rectangular) | Steel | Plain | 1 x 18.1875 1018 | 1x18.1875 1018/1020 steel machine key plain | 6 |
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| Endries | WI | Machine Key (Square & Rectangular) | Steel | Plain | M14 x 9 x 60 | 14x9x60 parallel key round both ends plain din 6885a | 110 |
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| Endries | WI | Machine Key (Square & Rectangular) | Steel | Plain | M20 x 12 x 130 | 20x12x130 parallel key round both ends plain din 6885a | 1 |
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| Endries | WI | Machine Key (Square & Rectangular) | Steel | Plain | M10 x 10 x 35 | M10x10x35 +.000/-.036 1045 square key w/rad ends | 8 |
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| Endries | WI | Machine Key (Square & Rectangular) | Steel | Plain | 3/4 x 4 .001 | 3/4x4 in. square key +.001-.000 | 18 |
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| Endries | WI | Machine Key (Square & Rectangular) | Steel | Plain | M18 x 11 x 50 | 18x11x50 1045 steel machine key w/rect ends din 6885b | 100 |
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| Endries | WI | Machine Key (Square & Rectangular) | Steel | Plain | 5/8 x 5 1/2 | 5/8x5-1/2 square machine key undersized plain | 13 |
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| Endries | WI | Machine Key (Square & Rectangular) | Steel | Plain | 5/8 x 4 .001 | 5/8x4 in. square key +.001-.000 | 38 |
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| Endries | WI | Machine Key (Square & Rectangular) | Steel | Plain | M22 x 14 x 160 | 22x14x160 parallel key round both ends plain din 6885a | 96 |
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| Irwin Ind | Ont | Machine Key (Square & Rectangular) | Steel | Plain | 5 x 5 x 20 | 5 x 5 x 20mm steel shaft key () () | 968 |
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| Irwin Ind | Ont | Machine Key (Square & Rectangular) | Steel | Plain | 1/4 x 1/4 x 1 1018 1045 | 1/4x1/4x1 machine key 1018-1045 steel () () | 51 |
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| Irwin Ind | Ont | Machine Key (Square & Rectangular) | Steel | Plain | M3 x 3 x 10 | 3mm x 3mm x 10mm parallel key c45k steel plain () () | 190 |
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| Irwin Ind | Ont | Machine Key (Square & Rectangular) | Steel | Plain | M5 x 5 x 20 | m5 x 5 x 20 din 6885b parallel key () () | 90 |
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| Century | FL | Machine Key (Square & Rectangular) | Steel | Plain | 1/4 x 1 1/2 | 1/4 x 1 1/2 square key (STEEL) (STEEL) () | 180 |
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| Century | FL | Machine Key (Square & Rectangular) | Steel | Plain | .37 | .376/.375 x 1.51/1.45 sq key rd ends (PER PRINT 35C113) (PER PRINT 35C113) () | 23 |
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| Century | FL | Machine Key (Square & Rectangular) | Steel | Plain | bossard bn870-5x5/18 | 100 |
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| Century | FL | Machine Key (Square & Rectangular) | Steel | Plain | 1/8 x 3/4 | 1/8 x 3/4 square key (STEEL) (STEEL) () | 14 |
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| Century | FL | Machine Key (Square & Rectangular) | Steel | Plain | 1/8 x 12 | 1/8 x 12 square key (STEEL) (STEEL) () | 15 |
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| Century | FL | Machine Key (Square & Rectangular) | Steel | Plain | 3/16 x 1 | 3/16 x 1 square key steel | 795 |
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| Century | FL | Machine Key (Square & Rectangular) | Steel | Plain | 3/16 x 7/8 | 3/16 x 7/8 square key (STEEL) (STEEL) () | 10 |
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| Century | FL | Machine Key (Square & Rectangular) | Steel | Plain | 3/16 x 1 0.00 | 3/16 x 1 square key +0.00-.002 (C10-18 STEEL) (C10-18 STEEL) () | 6 |
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| Century | FL | Machine Key (Square & Rectangular) | Steel | Plain | 3/16 x 1 3/8 | 3/16 x 1 3/8 square key (STEEL) (STEEL) () | 100 |
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| Century | FL | Machine Key (Square & Rectangular) | Steel | Plain | 1/4 x 1 3/4 | 1/4 x 1 3/4 square key (STEEL) (STEEL) () | 100 |
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| Century | FL | Machine Key (Square & Rectangular) | Steel | Plain | 1/2 x 1 3/4 | 1/2 x 1 3/4 square key (CRS STEEL) (CRS STEEL) () | 15 |
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| Century | FL | Machine Key (Square & Rectangular) | Steel | Plain | 3/4 x 3/4 x 6 | 3/4 x 3/4 x 6 square key steel | 25 |
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| Century | FL | Machine Key (Square & Rectangular) | Steel | Plain | 5/8 x 5/8 x 2 1/2 | 5/8 x 5/8 x 2 1/2 square key steel | 50 |
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| Purchase | MO | Machine Key (Square & Rectangular) | Steel | Plain | 3/16 x 1 | 3/16 x 1 square key | 211 |
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| Purchase | MO | Machine Key (Square & Rectangular) | Steel | Plain | M5 x 5 x 14 | m5 x 5 x 14 machine key w/ rounded ends stl plain | 100 |
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| MMCC | IL | Machine Key (Square & Rectangular) | Steel | Plain | M12 x 8 x 90 | shaft key din 6885 steel plain | inquire |
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| MMCC | IL | Machine Key (Square & Rectangular) | Steel | Plain | M4 x 4 x 30 | shaft key din 6885 steel plain | inquire |
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| MMCC | IL | Machine Key (Square & Rectangular) | Steel | Plain | M18 x 11 x 90 | shaft key steel plain a18x11x90 din 6885 | inquire |
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| MMCC | IL | Machine Key (Square & Rectangular) | Steel | Plain | M12 x 8 x 75 | shaft key din 6885 steel plain | inquire |
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| MMCC | IL | Machine Key (Square & Rectangular) | 316, 317, A4 Stainless | Plain | M10 x 8 x 50 | shaft key a4 a10x8x50 din 6885 a4 s/s class 12.9 plain | 5 |
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| MMCC | IL | Machine Key (Square & Rectangular) | 316, 317, A4 Stainless | Plain | M12 x 8 x 50 | shaft key a4 a12x8x50 din 6885 a4 s/s class 12.9 plain | inquire |
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| Liberty | IL | Machine Key (Square & Rectangular) | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | M6 x 6 x 25 | M6x6 x 25 long square machine key round edges 18-8 304 undersize din 6885 | 10 |
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| Liberty | IL | Machine Key (Square & Rectangular) | Steel | Plain | 6 | mx3mm long square machine key round edges din 885 undersize din 885 undersize | 395 |
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| WDMB | IA | Machine Key (Square & Rectangular) | Steel | Plain | 3/16 x 1 | key mach square under st (pl) 3/16x1 (W0C0) | 28,000 |
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| WDMB | IA | Machine Key (Square & Rectangular) | 300 Stainless (A1,A2, 18-8,304,310 etc.) | Plain | 3/16 x 3/4 | key mach square b under sst 303 3/16x3/4 (W0C0) | 5,040 |
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| WDMB | IA | Machine Key (Square & Rectangular) | Steel | Plain | key mach square st (pl) 1/4x1 1/8 reva (W000) | 600 |
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| WDMB | IA | Machine Key (Square & Rectangular) | Steel | Plain | M45 x 8 x 7 | feathkey c45c a 8x7x80 din 6885 (W010) | 300 |
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| WDMB | IA | Machine Key (Square & Rectangular) | Steel | Plain | M45 x 10 x 8 | feathkey c45c a 10x8x45 din 6885 (W050) | 2,451 |
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| WDMB | IA | Machine Key (Square & Rectangular) | Steel | Plain | 1/2 x 5/8 x 2.285 | key rect under st 1/2x5/8x2.285 (W010) | 92 |
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| WDMB | IA | Machine Key (Square & Rectangular) | Steel | Plain | M45 x 6 x 6 | feathkey c45c a 6x6x20 din 6885 (W010) | 1,000 |
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| WDMB | IA | Machine Key (Square & Rectangular) | Steel | Plain | M45 x 6 x 6 | feathkey c45c a 6x6x50 din 6885 (W010) | 500 |
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| WDMB | IA | Machine Key (Square & Rectangular) | Steel | Plain | M45 x 5 x 5 | feathkey c45c a 5x5x30 din 6885 (W010) | 800 |
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| WDMB | IA | Machine Key (Square & Rectangular) | Steel | Plain | 1/4 x 1/4 x 1 7/8 | key mach us sq b 1/4x1/4x1 7/8 (W050) | 653 |
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| WDMB | IA | Machine Key (Square & Rectangular) | Steel | Plain | 3/8 x 3/8 x 2 | key mach us sq b 3/8x3/8x2 (W040) | 651 |
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| WDMB | IA | Machine Key (Square & Rectangular) | Steel | Plain | M45 x 8 x 7 | feathkey c45c a 8x7x30 din 6885 (W010) | 520 |
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| WDMB | IA | Machine Key (Square & Rectangular) | Steel | Plain | 3/16 x 3/16 x 3/4 | key mach us sq b hard 3/16x3/16x3/4 (W050) | 303 |
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| FTS | OH | Machine Key (Square & Rectangular) | Steel | Plain | M10 | x8/x100 parallel key stl din 6885a | 30 |
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| FTS | OH | Machine Key (Square & Rectangular) | Steel | Plain | M10 | x8/x32 parallel key prnt stl din 6885a | 392 |
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| FTS | OH | Machine Key (Square & Rectangular) | Steel | Plain | M10 | x8/x56 parallel key stl din 6885a | 28 |
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| FTS | OH | Machine Key (Square & Rectangular) | Steel | Plain | M14 | x9/x 38 parallel key sq end stl | 75 |
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| FTS | OH | Machine Key (Square & Rectangular) | Steel | Plain | M2 | x2/x14 parallel key stl din 6885a | 100 |
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| FTS | OH | Machine Key (Square & Rectangular) | Steel | Plain | M2 | x2/x20 parallel key stl din 6885a | 238 |
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| FTS | OH | Machine Key (Square & Rectangular) | Steel | Plain | M2 | x2/x6 parallel key stl din 6885a | 229 |
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| FTS | OH | Machine Key (Square & Rectangular) | Steel | Plain | M2 | x2/x8 parallel key stl din 6885a | 202 |
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| FTS | OH | Machine Key (Square & Rectangular) | Steel | Plain | M3 | x3/x14 parallel key stl din 6885a | 255 |
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| FTS | OH | Machine Key (Square & Rectangular) | Steel | Plain | M3 | x3/x20 parallel key stl din 6885a | 161 |
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| FTS | OH | Machine Key (Square & Rectangular) | Steel | Plain | M3 | x3/x 7 parallel key sq end print stl | 140 |
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| TSF | TX | Machine Key (Square & Rectangular) | Steel | Plain | M3 x 3 x 6 | square key 3mm x 3mm x 6mm lg plain | 150 |
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| ACF | CA | Machine Key (Square & Rectangular) | Steel | Plain | M2 x 2 x 6 | M2xm2x6 metric parallel key steel | 100 |
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| Eurolink | SC | Machine Key (Square & Rectangular) | Steel | Plain | M10 x 8 x 28 | 10x8 x 28 a plain finish parallel key with round ends din 6885 | inquire |
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| Eurolink | SC | Machine Key (Square & Rectangular) | Steel | Plain | M10 x 8 x 20 | 10x8 x 20 a plain finish parallel key with round ends din 6885 | inquire |
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| Eurolink | SC | Machine Key (Square & Rectangular) | 316, 317, A4 Stainless | Plain | M12 x 8 x 40 | 12x8 x 40 a a4 stainless steel parallel key with round ends din 6885 | inquire |
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| Eurolink | SC | Machine Key (Square & Rectangular) | 316, 317, A4 Stainless | Plain | M14 x 9 x 40 | 14x9 x 40 a a4 stainless steel parallel key with round ends din 6885 | inquire |
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| Eurolink | SC | Machine Key (Square & Rectangular) | Steel | Plain | M14 x 9 x 63 | 14x9 x 63 a plain finish parallel key with round ends din 6885 | inquire |
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| Eurolink | SC | Machine Key (Square & Rectangular) | Steel | Plain | M5 x 5 x 32 | 5x5 x 32 a plain finish parallel key with round ends din 6885 | inquire |
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| Eurolink | SC | Machine Key (Square & Rectangular) | 316, 317, A4 Stainless | Plain | M8 x 7 x 20 | 8x7 x 20 a a4 stainless steel parallel key with round ends din 6885 | inquire |
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| Eurolink | SC | Machine Key (Square & Rectangular) | Steel | Plain | M8 x 7 x 20 | 8x7 x 20 a plain finish parallel key with round ends din 6885 | inquire |
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| Eurolink | SC | Machine Key (Square & Rectangular) | Steel | Plain | M22 x 14 x 100 | M22x14x100 plain finish taper key with gib head din 6887 | inquire |
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| Eurolink | SC | Machine Key (Square & Rectangular) | Steel | Plain | M10 x 8 x 25 | 10x8 x 25 a plain finish parallel key with round ends din 6885 | inquire |
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| Eurolink | SC | Machine Key (Square & Rectangular) | Steel | Plain | M22 x 14 x 100 | 22x14x100 a plain finish parallel key with round ends din 6885 | inquire |
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| Eurolink | SC | Machine Key (Square & Rectangular) | Steel | Plain | M28 x 16 x 160 | M28x16x160 plain finish taper key with gib head din 6887 | inquire |
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| Eurolink | SC | Machine Key (Square & Rectangular) | 316, 317, A4 Stainless | Plain | M18 x 11 x 63 | 18x11x63 a a4 stainless steel parallel key with round ends din 6885 | inquire |
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| Eurolink | SC | Machine Key (Square & Rectangular) | Steel | Plain | M6 x 6 x 32 | 6x6 x 32 a plain finish parallel key with round ends din 6885 | inquire |
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| Eurolink | SC | Machine Key (Square & Rectangular) | 316, 317, A4 Stainless | Plain | M18 x 11 x 60 | 18x11x60 a a4 stainless steel parallel key with round ends din 6885 | inquire |
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| Eurolink | SC | Machine Key (Square & Rectangular) | 316, 317, A4 Stainless | Plain | M4 x 4 x 32 | 4x4 x 32 a a4 stainless steel parallel key with round ends din 6885 | inquire |
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| Eurolink | SC | Machine Key (Square & Rectangular) | 316, 317, A4 Stainless | Plain | M4 x 4 x 25 | 4x4 x 25 a a4 stainless steel parallel key with round ends din 6885 | inquire |
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| Eurolink | SC | Machine Key (Square & Rectangular) | 316, 317, A4 Stainless | Plain | M14 x 9 x 70 | 14x9 x 70 a a4 stainless steel parallel key with round ends din 6885 | inquire |
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| Eurolink | SC | Machine Key (Square & Rectangular) | 316, 317, A4 Stainless | Plain | M5 x 5 x 12 | 5x5 x 12 a a4 stainless steel parallel key with round ends din 6885 | inquire |
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| Eurolink | SC | Machine Key (Square & Rectangular) | Steel | Plain | M6 x 6 x 30 | 6x6 x 30 a plain finish parallel key with round ends din 6885 | inquire |
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| Ababa | CA | Machine Key (Square & Rectangular) | Steel | Zinc/Clear | M7 | 7mm square tool key zinc alloy nickle pltd | 10 |
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| Wurth | Ont | Machine Key (Square & Rectangular) | 316, 317, A4 Stainless | Plain | M10 x 8 x 63 | feathkey din6885 a a4 10x8x63 | 40 |
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| Wurth | Ont | Machine Key (Square & Rectangular) | 316, 317, A4 Stainless | Plain | M6 x 6 x 20 | feathkey din6885 a a4 6x6x20 | 149 |
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| Wurth | Ont | Machine Key (Square & Rectangular) | 316, 317, A4 Stainless | Plain | M10 x 8 x 60 | feathkey din6885 a a4 10x8x60 | 98 |
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| Wurth | Ont | Machine Key (Square & Rectangular) | Steel | Plain | M45 x 8 x 7 | feathkey din6885 c45c a 8x7x22 | 387 |
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| Wurth | Ont | Machine Key (Square & Rectangular) | Steel | Plain | M45 x 8 x 7 | feathkey din6885 c45c a 8x7x45 | 700 |
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| Wurth | Ont | Machine Key (Square & Rectangular) | Steel | Plain | M45 x 14 x 9 | feathkey din6885 c45c a 14x9x75 | 195 |
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| Wurth | Ont | Machine Key (Square & Rectangular) | Steel | Plain | M45 x 10 x 8 | feathkey din6885 c45c a 10x8x60 | 150 |
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| Wurth | Ont | Machine Key (Square & Rectangular) | Steel | Plain | M45 x 20 x 12 | feathkey din6885 c45c b 20x12x125 | 20 |
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| Wurth | Ont | Machine Key (Square & Rectangular) | Steel | Plain | 7/16 x 5/8 x 3 | key rect over st 1045 (pl) 7/16x5/8x3 | 9 |
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| Wurth Ada | MN | Machine Key (Square & Rectangular) | Steel | Plain | M5 x 5 x 45 | feathkey din6885 c45k a 5x5x45 | 1,500 |
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| Wurth Ada | MN | Machine Key (Square & Rectangular) | Steel | Plain | M4 x 4 x 14 | feathkey din6885 c45k a 4x4x14 | 1,500 |
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| Hewes | NY | Machine Key (Square & Rectangular) | Steel | Plain | 3/32 x 5/8 | sqr keysundersize stl | 150 |
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| Hewes | NY | Machine Key (Square & Rectangular) | Steel | Plain | 1/8 x 1/2 | sqr key | 208 |
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| Hewes | NY | Machine Key (Square & Rectangular) | Steel | Plain | 1/8 x 5/8 | sqr keysundersize stl | 545 |
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| Hewes | NY | Machine Key (Square & Rectangular) | Steel | Plain | 1/8 x 1 1/4 | sqr key | 100 |
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| Hewes | NY | Machine Key (Square & Rectangular) | Steel | Plain | 1/8 x 1 | sqr key | 402 |
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| Hewes | NY | Machine Key (Square & Rectangular) | Steel | Plain | 3/16 x 2 | sqr keys | 90 |
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| Hewes | NY | Machine Key (Square & Rectangular) | Steel | Plain | 3/16 x 1 1/8 | sqr keysundersize stl | 140 |
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| Hewes | NY | Machine Key (Square & Rectangular) | Steel | Plain | 1/4 x 3/4 | sqr keysundersize stl | 120 |
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| Hewes | NY | Machine Key (Square & Rectangular) | Steel | Plain | 1/4 x 1/4 x 2 7/8 | sqr keyprint# 843-4-46length tolerance +/-.010 | 175 |
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| Hewes | NY | Machine Key (Square & Rectangular) | Steel | Plain | 1/4 x 1 1/2 | sqr key | 194 |
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| Hewes | NY | Machine Key (Square & Rectangular) | Steel | Plain | 1/4 x 2 1/8 | sqr keysundersize stl | 110 |
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| Hewes | NY | Machine Key (Square & Rectangular) | Steel | Plain | 1/4 x 1/4 x 1 3/4 | sqr keyprint #843-4-28 | 159 |
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| Hewes | NY | Machine Key (Square & Rectangular) | Steel | Plain | 1/4 x 1 3/16 | sqr keysundersize stl | 110 |
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| Hewes | NY | Machine Key (Square & Rectangular) | Steel | Plain | 1/4 x 1 1/4 | sqr key | 250 |
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| Hewes | NY | Machine Key (Square & Rectangular) | Steel | Plain | 1/4 x 3 3/8 | sqr keysundersize | 120 |
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| Hewes | NY | Machine Key (Square & Rectangular) | Steel | Plain | 1/4 x 1 1/4 | sqr keysundersize stl | 200 |
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| Hewes | NY | Machine Key (Square & Rectangular) | Steel | Plain | M3 x 3 x 10 | M3x3 x 10 parallel key bn 870 | 42 |
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