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Machine Keys, Plain

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.

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SupplierLocTypeMaterialFinishSizeDescriptionQty 
JacksonMSMachine Key (Square & Rectangular)SteelPlain3/16 x 1 1/4key machine square43
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JacksonMSMachine Key (Square & Rectangular)SteelPlain5/16 x 3/8 x 12key machine rectangle26
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JacksonMSMachine Key (Square & Rectangular)SteelPlain5/16 x 1/2 x 12key machine rectangle3
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JacksonMSMachine Key (Square & Rectangular)SteelPlain3/8 x 5/8 x 12key machine rectangle6
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JacksonMSMachine Key (Square & Rectangular)SteelPlain1/2 x 3/4 x 121/2 x 3/4 x 12 key machine rectangle high carbon steel bilateral astm a29 plain finish9
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MAINSOURCNHMachine Key (Square & Rectangular)SteelPlainM4 x 4 x 20m4 x 4 x 20 din 6885a parallel key st150
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MAINSOURCNHMachine Key (Square & Rectangular)SteelPlainM5 x 5 x 32m5 x 5 x 32 din 6885a shaft key st46
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YANKEENHMachine Key (Square & Rectangular)SteelPlainM4 x 4 x 20m4 x 4 x 20 parallel key w/round end-plain50
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Irwin IndOntMachine Key (Square & Rectangular)SteelPlain5 x 5 x 205 x 5 x 20mm steel shaft key968
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Irwin IndOntMachine Key (Square & Rectangular)SteelPlain1/4 x 1/4 x 1 1018 10451/4x1/4x1 machine key 1018-1045 steel51
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Irwin IndOntMachine Key (Square & Rectangular)SteelPlainM3 x 3 x 103mm x 3mm x 10mm parallel key c45k steel plain190
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Irwin IndOntMachine Key (Square & Rectangular)SteelPlainM5 x 5 x 20m5 x 5 x 20 din 6885b parallel key90
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CenturyFLMachine Key (Square & Rectangular)SteelPlain1/4 x 1 1/21/4 x 1 1/2 square key (STEEL) (STEEL) 180
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CenturyFLMachine Key (Square & Rectangular)SteelPlain.37.376/.375 x 1.51/1.45 sq key rd ends (PER PRINT 35C113) (PER PRINT 35C113) 23
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CenturyFLMachine Key (Square & Rectangular)SteelPlain1/8 x 121/8 x 12 square key (STEEL) (STEEL) 15
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CenturyFLMachine Key (Square & Rectangular)SteelPlain3/16 x 13/16 x 1 square key steel 795
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CenturyFLMachine Key (Square & Rectangular)SteelPlain3/16 x 7/83/16 x 7/8 square key (STEEL) (STEEL) 10
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CenturyFLMachine Key (Square & Rectangular)SteelPlain3/16 x 1 3/83/16 x 1 3/8 square key (STEEL) (STEEL) 100
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CenturyFLMachine Key (Square & Rectangular)SteelPlain1/4 x 1 3/41/4 x 1 3/4 square key (STEEL) (STEEL) 100
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CenturyFLMachine Key (Square & Rectangular)SteelPlain1/2 x 1 3/41/2 x 1 3/4 square key (CRS STEEL) (CRS STEEL) 15
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CenturyFLMachine Key (Square & Rectangular)SteelPlain3/4 x 3/4 x 63/4 x 3/4 x 6 square key steel 25
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CenturyFLMachine Key (Square & Rectangular)SteelPlain5/8 x 5/8 x 2 1/25/8 x 5/8 x 2 1/2 square key steel 50
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EndriesWIMachine Key (Square & Rectangular)SteelPlain1/4 x 11/4x1 c1018 square machine key undersized plain351
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EndriesWIMachine Key (Square & Rectangular)SteelPlain3/16 x 1 3/43/16x1-3/4 square machine key undersized plain2226
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EndriesWIMachine Key (Square & Rectangular)SteelPlainM20 x 12 x 13020x12x130 parallel key round both ends plain din 6885a1
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EndriesWIMachine Key (Square & Rectangular)SteelPlainM10 x 10 x 35M10x10x35 +.000/-.036 1045 square key w/rad ends8
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EndriesWIMachine Key (Square & Rectangular)SteelPlain3/4 x 4 .0013/4x4 in. square key +.001-.00018
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EndriesWIMachine Key (Square & Rectangular)SteelPlain5/8 x 5 1/25/8x5-1/2 square machine key undersized plain13
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EndriesWIMachine Key (Square & Rectangular)SteelPlain5/8 x 4 .0015/8x4 in. square key +.001-.00038
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EndriesWIMachine Key (Square & Rectangular)SteelPlainM22 x 14 x 16022x14x160 parallel key round both ends plain din 6885a96
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LibertyILMachine Key (Square & Rectangular)300 Stainless (A1,A2, 18-8,304,310 etc.)PlainM6 x 6 x 25M6x6 x 25 long square machine key round edges 18-8 304 undersize din 688510
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LibertyILMachine Key (Square & Rectangular)SteelPlain6mx3mm long square machine key round edges din 885 undersize din 885 undersize195
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Purchase MOMachine Key (Square & Rectangular)SteelPlain3/16 x 13/16 x 1 square key211
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Purchase MOMachine Key (Square & Rectangular)SteelPlainM5 x 5 x 14m5 x 5 x 14 machine key w/ rounded ends stl plain100
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MMCCILMachine Key (Square & Rectangular)SteelPlainM12 x 8 x 90shaft key din 6885 steel plaininquire
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MMCCILMachine Key (Square & Rectangular)SteelPlainM4 x 4 x 30shaft key din 6885 steel plaininquire
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MMCCILMachine Key (Square & Rectangular)SteelPlainM18 x 11 x 90shaft key steel plain a18x11x90 din 6885inquire
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MMCCILMachine Key (Square & Rectangular)SteelPlainM12 x 8 x 75shaft key din 6885 steel plaininquire
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MMCCILMachine Key (Square & Rectangular)316, 317, A4 StainlessPlainM10 x 8 x 50shaft key a4 a10x8x50 din 6885 a4 s/s class 12.9 plain5
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MMCCILMachine Key (Square & Rectangular)316, 317, A4 StainlessPlainM12 x 8 x 50shaft key a4 a12x8x50 din 6885 a4 s/s class 12.9 plaininquire
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WDMBIAMachine Key (Square & Rectangular)SteelPlain3/16 x 1key mach square under st (pl) 3/16x1 (W0C0)28,000
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WDMBIAMachine Key (Square & Rectangular)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain3/16 x 3/4key mach square b under sst 303 3/16x3/4 (W0C0)5,040
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WDMBIAMachine Key (Square & Rectangular)SteelPlainkey mach square st (pl) 1/4x1 1/8 reva (W000)600
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WDMBIAMachine Key (Square & Rectangular)SteelPlainM45 x 8 x 7feathkey c45c a 8x7x80 din 6885 (W010)300
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WDMBIAMachine Key (Square & Rectangular)SteelPlainM45 x 10 x 8feathkey c45c a 10x8x45 din 6885 (W050)2,451
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WDMBIAMachine Key (Square & Rectangular)SteelPlain1/2 x 5/8 x 2.285key rect under st 1/2x5/8x2.285 (W010)92
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WDMBIAMachine Key (Square & Rectangular)SteelPlainM45 x 6 x 6feathkey c45c a 6x6x20 din 6885 (W010)1,000
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WDMBIAMachine Key (Square & Rectangular)SteelPlainM45 x 6 x 6feathkey c45c a 6x6x50 din 6885 (W010)500
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WDMBIAMachine Key (Square & Rectangular)SteelPlainM45 x 5 x 5feathkey c45c a 5x5x30 din 6885 (W010)800
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WDMBIAMachine Key (Square & Rectangular)SteelPlain1/4 x 1/4 x 1 7/8key mach us sq b 1/4x1/4x1 7/8 (W050)653
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WDMBIAMachine Key (Square & Rectangular)SteelPlain3/8 x 3/8 x 2key mach us sq b 3/8x3/8x2 (W040)651
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WDMBIAMachine Key (Square & Rectangular)SteelPlainM45 x 8 x 7feathkey c45c a 8x7x30 din 6885 (W010)520
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WDMBIAMachine Key (Square & Rectangular)SteelPlain3/16 x 3/16 x 3/4key mach us sq b hard 3/16x3/16x3/4 (W050)303
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FTSOHMachine Key (Square & Rectangular)SteelPlainM10x8/x100 parallel key stl din 6885a30
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FTSOHMachine Key (Square & Rectangular)SteelPlainM10x8/x32 parallel key prnt stl din 6885a392
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FTSOHMachine Key (Square & Rectangular)SteelPlainM10x8/x56 parallel key stl din 6885a28
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FTSOHMachine Key (Square & Rectangular)SteelPlainM14x9/x 38 parallel key sq end stl75
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FTSOHMachine Key (Square & Rectangular)SteelPlainM2x2/x14 parallel key stl din 6885a100
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FTSOHMachine Key (Square & Rectangular)SteelPlainM2x2/x20 parallel key stl din 6885a238
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FTSOHMachine Key (Square & Rectangular)SteelPlainM2x2/x6 parallel key stl din 6885a229
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FTSOHMachine Key (Square & Rectangular)SteelPlainM2x2/x8 parallel key stl din 6885a202
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FTSOHMachine Key (Square & Rectangular)SteelPlainM3x3/x14 parallel key stl din 6885a255
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FTSOHMachine Key (Square & Rectangular)SteelPlainM3x3/x20 parallel key stl din 6885a161
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FTSOHMachine Key (Square & Rectangu lar)SteelPlainM3x3/x 7 parallel key sq end print stl140
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TSFTXMachine Key (Square & Rectangular)SteelPlainM3 x 3 x 6square key 3mm x 3mm x 6mm lg plain150
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ACFCAMachine Key (Square & Rectangular)SteelPlainM2 x 2 x 6M2xm2x6 metric parallel key steel100
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EurolinkSCMachine Key (Square & Rectangular)SteelPlainM10 x 8 x 2810x8 x 28 a plain finish parallel key with round ends din 6885inquire
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EurolinkSCMachine Key (Square & Rectangular)SteelPlainM10 x 8 x 2010x8 x 20 a plain finish parallel key with round ends din 6885inquire
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EurolinkSCMachine Key (Square & Rectangular)316, 317, A4 StainlessPlainM12 x 8 x 4012x8 x 40 a a4 stainless steel parallel key with round ends din 6885inquire
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EurolinkSCMachine Key (Square & Rectangular)316, 317, A4 StainlessPlainM14 x 9 x 4014x9 x 40 a a4 stainless steel parallel key with round ends din 6885inquire
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EurolinkSCMachine Key (Square & Rectangular)SteelPlainM14 x 9 x 6314x9 x 63 a plain finish parallel key with round ends din 6885inquire
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EurolinkSCMachine Key (Square & Rectangular)SteelPlainM5 x 5 x 325x5 x 32 a plain finish parallel key with round ends din 6885inquire
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EurolinkSCMachine Key (Square & Rectangular)316, 317, A4 StainlessPlainM8 x 7 x 208x7 x 20 a a4 stainless steel parallel key with round ends din 6885inquire
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EurolinkSCMachine Key (Square & Rectangular)SteelPlainM8 x 7 x 208x7 x 20 a plain finish parallel key with round ends din 6885inquire
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EurolinkSCMachine Key (Square & Rectangular)SteelPlainM22 x 14 x 100M22x14x100 plain finish taper key with gib head din 6887inquire
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EurolinkSCMachine Key (Square & Rectangular)SteelPlainM10 x 8 x 2510x8 x 25 a plain finish parallel key with round ends din 6885inquire
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EurolinkSCMachine Key (Square & Rectangular)SteelPlainM22 x 14 x 10022x14x100 a plain finish parallel key with round ends din 6885inquire
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EurolinkSCMachine Key (Square & Rectangular)SteelPlainM28 x 16 x 160M28x16x160 plain finish taper key with gib head din 6887inquire
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EurolinkSCMachine Key (Square & Rectangular)316, 317, A4 StainlessPlainM18 x 11 x 6318x11x63 a a4 stainless steel parallel key with round ends din 6885inquire
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EurolinkSCMachine Key (Square & Rectangular)SteelPlainM6 x 6 x 326x6 x 32 a plain finish parallel key with round ends din 6885inquire
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EurolinkSCMachine Key (Square & Rectangular)316, 317, A4 StainlessPlainM18 x 11 x 6018x11x60 a a4 stainless steel parallel key with round ends din 6885inquire
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EurolinkSCMachine Key (Square & Rectangular)316, 317, A4 StainlessPlainM4 x 4 x 324x4 x 32 a a4 stainless steel parallel key with round ends din 6885inquire
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EurolinkSCMachine Key (Square & Rectangular)316, 317, A4 StainlessPlainM4 x 4 x 254x4 x 25 a a4 stainless steel parallel key with round ends din 6885inquire
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EurolinkSCMachine Key (Square & Rectangular)316, 317, A4 StainlessPlainM14 x 9 x 7014x9 x 70 a a4 stainless steel parallel key with round ends din 6885inquire
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EurolinkSCMachine Key (Square & Rectangular)316, 317, A4 StainlessPlainM5 x 5 x 125x5 x 12 a a4 stainless steel parallel key with round ends din 6885inquire
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EurolinkSCMachine Key (Square & Rectangular)SteelPlainM6 x 6 x 306x6 x 30 a plain finish parallel key with round ends din 6885inquire
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WurthOntMachine Key (Square & Rectangular)316, 317, A4 StainlessPlainM10 x 8 x 63feathkey din6885 a a4 10x8x6340
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WurthOntMachine Key (Square & Rectangular)316, 317, A4 StainlessPlainM6 x 6 x 20feathkey din6885 a a4 6x6x20149
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WurthOntMachine Key (Square & Rectangular)316, 317, A4 StainlessPlainM10 x 8 x 60feathkey din6885 a a4 10x8x6098
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WurthOntMachine Key (Square & Rectangular)SteelPlainM45 x 8 x 7feathkey din6885 c45c a 8x7x22387
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WurthOntMachine Key (Square & Rectangular)SteelPlainM45 x 8 x 7feathkey din6885 c45c a 8x7x45700
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WurthOntMachine Key (Square & Rectangular)SteelPlainM45 x 14 x 9feathkey din6885 c45c a 14x9x75195
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WurthOntMachine Key (Square & Rectangular)SteelPlainM45 x 10 x 8feathkey din6885 c45c a 10x8x60150
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WurthOntMachine Key (Square & Rectangular)SteelPlainM45 x 20 x 12feathkey din6885 c45c b 20x12x12520
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WurthOntMachine Key (Square & Rectangular)SteelPlain7/16 x 5/8 x 3key rect over st 1045 (pl) 7/16x5/8x39
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Wurth AdaMNMachine Key (Square & Rectangular)SteelPlainM5 x 5 x 45feathkey din6885 c45k a 5x5x451,500
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Wurth AdaMNMachine Key (Square & Rectangular)SteelPlainM4 x 4 x 14feathkey din6885 c45k a 4x4x141,500
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HewesNYMachine Key (Square & Rectangular)SteelPlain3/32 x 5/8sqr keysundersize stl150
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HewesNYMachine Key (Square & Rectangular)SteelPlain1/8 x 1/2sqr key208
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HewesNYMachine Key (Square & Rectangular)SteelPlain1/8 x 5/8sqr keysundersize stl545
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HewesNYMachine Key (Square & Rectangular)SteelPlain1/8 x 1 1/4sqr key100
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HewesNYMachine Key (Square & Rectangular)SteelPlain1/8 x 1sqr key402
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HewesNYMachine Key (Square & Rectangular)SteelPlain3/16 x 2sqr keys90
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HewesNYMachine Key (Square & Rectangular)SteelPlain3/16 x 1 1/8sqr keysundersize stl140
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HewesNYMachine Key (Square & Rectangular)SteelPlain1/4 x 3/4sqr keysundersize stl120
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HewesNYMachine Key (Square & Rectangular)SteelPlain1/4 x 1/4 x 2 7/8sqr keyprint# 843-4-46length tolerance +/-.010175
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HewesNYMachine Key (Square & Rectangular)SteelPlain1/4 x 1 1/2sqr key194
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HewesNYMachine Key (Square & Rectangular)SteelPlain1/4 x 2 1/8sqr keysundersize stl110
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HewesNYMachine Key (Square & Rectangular)SteelPlain1/4 x 1/4 x 1 3/4sqr keyprint #843-4-28159
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HewesNYMachine Key (Square & Rectangular)SteelPlain1/4 x 1 3/16sqr keysundersize stl110
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HewesNYMachine Key (Square & Rectangular)SteelPlain1/4 x 1 1/4sqr key250
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HewesNYMachine Key (Square & Rectangular)SteelPlain1/4 x 3 3/8sqr keysundersize120
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HewesNYMachine Key (Square & Rectangular)SteelPlain1/4 x 1 1/4sqr keysundersize stl200
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HewesNYMachine Key (Square & Rectangular)SteelPlainM3 x 3 x 10M3x3 x 10 parallel key bn 87042
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