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3/16 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.

63 results, (click on any line for more information)

Buy Machine Keys from one of our FCH Network Members
SupplierLocTypeMaterialFinishSizeDescriptionQty 
JacksonMSMachine Key (Square & Rectangular)SteelPlain3/16 x 1 1/4key machine square43
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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 1 3/83/16 x 1 3/8 square key (STEEL) (STEEL) 100
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NAPPCOTXMachine Key (Square & Rectangular)SteelZinc/Clear3/16 x 3/16 x 363/16 x 3/16 x 36 square key zp rohs (60-KEYS and KEY TOOLS) (60-KEYS and KEY TOOLS) (60-KEYS and KEY TOOLS) (60-KEYS and KEY TOOLS) (60-KEYS and KEY TOOLS) (60-KEYS and KEY TOOLS) (60-KEYS and KEY TOOLS) (60-KEYS and KEY TOOLS) (60-KEYS and KEY TOOLS) (60-KEYS and KEY TOOLS) (60-KEYS and KEY TOOLS) (60-KEYS and KEY TOOLS) (60-KEYS and KEY TOOLS) (60-KEYS and KEY TOOLS) (60-KEYS and KEY TOOLS) (60-KEYS and KEY TOOLS) (60-KEYS and KEY TOOLS) (60-KEYS and KEY TOOLS) (60-KEYS and KEY TOOLS)5
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HayesCAMachine Key (Square & Rectangular)SteelPlain3/16 x 3/16 x 3/4ms20066-183 3/16 x 3/16 x 3/4 gr c keystock steel300
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EndriesWIMachine Key (Square & Rectangular)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain3/16x1 18-8 stainless steel square undersized machine key1800
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EndriesWIMachine Key (Square & Rectangular)SteelPlain3/16x9/16 square machine key undersized plain6
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EndriesWIMachine Key (Square & Rectangular)SteelPlain3/16x1-1/4 square machine key undersized plain25
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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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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)SteelPlain3/16 x 1/23/16x1/2 sq machine key100
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EndriesWIMachine Key (Square & Rectangular)SteelPlain3/16 x 5/83/16x5/8 square machine key undersized plain37
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EndriesWIMachine Key (Square & Rectangular)SteelPlain3/16 x 3/16 x .625 0.0303/16x3/16x.625 lg + 0/-.030 square machine key both ends square steel366
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EndriesWIMachine Key (Square & Rectangular)SteelPlain3/16 x 15/163/16x15/16 square machine key undersized plain100
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ManscoMIMachine Key (Square & Rectangular)SteelPlain3/16 x 3/16 x 13/163/16x3/16x13/16 square key pln718
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ManscoMIMachine Key (Square & Rectangular)SteelPlain3/16 x 3/16 x 1 29/323/16x3/16x1-29/32 square key pln391
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ManscoMIMachine Key (Square & Rectangular)SteelPlain3/16 x 3/16 x 1-5/16 square key pln250
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CenturyNYMachine Key (Square & Rectangular)SteelPlain3/16 x 7/8 square key steel10
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CenturyNYMachine Key (Square & Rectangular)SteelPlain3/16 x 1 square key steel795
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CenturyNYMachine Key (Square & Rectangular)SteelPlain3/16 x 1 3/8 square key steel100
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LibertyILMachine Key (Square & Rectangular)SteelPlain3/16 x 12square key4
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LibertyILMachine Key (Square & Rectangular)SteelPlain3/16 x 2square key80
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LibertyILMachine Key (Square & Rectangular)SteelPlain3/16 x 1 9/32 x 5/323/16 x 1 9/32 x 5/32 rect. key plain plain K15018N01285
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LibertyILMachine Key (Square & Rectangular)SteelZinc/Clear3/16 x 12square key5
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LibertyILMachine Key (Square & Rectangular)SteelPlain3/16 x 7/8square key2,000
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LibertyILMachine Key (Square & Rectangular)SteelPlain3/16 x 1 3/8square key90
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LibertyILMachine Key (Square & Rectangular)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain3/16 square key (+0/-.002) x 1-11/64 overall length form b 18-8 stainless steel1
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SWACOOHMachine Key (Square & Rectangular)SteelPlain3/16 x 3/16 x 12sq key 3/16x3/16x12 cs pln57
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SWACOOHMachine Key (Square & Rectangular)SteelPlain3/16 x 3/16 x 13/16x3/16x1 cut key695
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SWACOOHMachine Key (Square & Rectangular)SteelPlain3/16 x 1/4 x .863/16x1/4x.86 cut key100
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SWACOOHMachine Key (Square & Rectangular)SteelPlain3/16 x 3/16 x 1 3/83/16x3/16x1 3/8 cut key760
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SWACOOHMachine Key (Square & Rectangular)SteelPlain3/16 x 3/16 x 1 1/23/16x3/16x1 1/2 cut key +.001/-.000934
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SWACOOHMachine Key (Square & Rectangular)SteelPlain3/16 x 3/16 x 3/43/16x3/16x3/4 cut key +.001/-.000311
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SWACOOHMachine Key (Square & Rectangular)SteelPlain3/16 x 3/16 x 1 1/43/16x3/16x1 1/4 cut key +.001/-.000354
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MidStatesMIMachine Key (Square & Rectangular)SteelPlain3/16 x 3/16sq machinery key 2-1/22
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MidStatesMIMachine Key (Square & Rectangular)SteelPlain3/16 x 3/16 x .8753/16 x 3/16 x .875 machine key200
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WDMBIAMachine Key (Square & Rectangular)SteelPlain3/16 x 1/8 x 1/2key rectangular st (pl) 3/16x1/8x1/2 drw (W000) (W000) (W000)2,490
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Purchase MOMachine Key (Square & Rectangular)SteelPlain3/16 x 13/16 x 1 square key211
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IPCVAMachine Key (Square & Rectangular)SteelPlain3/16 x 9/163/16x9/16 sq. key one end rnd. c of c req. (jg1-3/16x9) per mes-0007 spec685
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IPCVAMachine Key (Square & Rectangular)SteelPlain3/16 x 13/16x1 sq. key one end rnd. c of c req. per mes-0007 spec356
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IPCVAMachine Key (Square & Rectangular)SteelPlain3/16 x 3/43/16x3/4 sq. key rnd ends c of c req. per mes spec 007 (jf1-3/16x12)384
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IPCVAMachine Key (Square & Rectangular)SteelPlain3/16 x 1 3/163/16x1 3/16 sq. key rnd ends c of c req. per mes-0007 spec (jf1-3/16x19)64
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IPCVAMachine Key (Square & Rectangular)SteelPlain3/16 x 1 1/23/16x1 1/2 sq. key one end rnd. including mil-test reports identifying the material heat treat tensile and yield per mes-0007 spec (jg1-3/16x24)57
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IPCVAMachine Key (Square & Rectangular)SteelPlain3/16 x 15/163/16x15/16 sq. key one end rnd. c of c req. per mes-0007 spec326
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IPCVAMachine Key (Square & Rectangular)SteelPlain3/16 x 2 1/83/16x2 1/8 sq. key rnd ends c of c req. per mes-0007 spec (jf1-3/16x34)32
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IPCVAMachine Key (Square & Rectangular)SteelPlain3/16 x 5/83/16x5/8 sq. key rnd ends c of c req. per mes-0007 spec (jf1-3/16x10)313
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IPCVAMachine Key (Square & Rectangular)SteelPlain3/16 x 3/43/16x3/4 sq. key one end rnd. including mil-test report identifying the material heat treat tensile and yield per mes-0007 spec (jg1-3/16x12)135
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LibertyILMachine Key (Square & Rectangular)SteelPlain3/16 x 3/16 x 1machine key oversized square ends100
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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)SteelPlain3/16 x 3/16 x 3/4key mach us sq b hard 3/16x3/16x3/4 (W050)303
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WDMBIAMachine Key (Square & Rectangular)SteelPlain3/16 x 1/4 x 1 7/64key rect st (pl) 3/16x1/4x1 7/6432
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WDMBIAMachine Key (Square & Rectangular)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain3/16 x 1 1/4key mach sqr b under (18 8) 3/16x1 1/4 (W020) (W020)12,000
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ISSCOMOMachine Key (Square & Rectangular)Grade 2Plain3/16 x 3/16 x 2 1/8square-.001/.0002000
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NAPPCOTXMachine Key (Square & Rectangular)SteelZinc/Clear3/16 x 3/16 x 363/16x3/16x36 square key zp rohs5
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IRFNJMachine Key (Square & Rectangular)BrassPlain3/16 x 3/16 x 1 1/2long square key1039
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IRFNJMachine Key (Square & Rectangular)BrassPlain3/16 x 3/16 x 1 1/2long square key1039
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LibertyILMachine Key (Square & Rectangular)SteelPlain3/16 x 1 1/4square key150
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WSBKYMachine Key (Square & Rectangular)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain3/16 x 1 1/4key mach sqr b under (18-8) 3/16x1 1/412,000
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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)SteelPlain3/16 x 13/16x 1 sqr key276
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HewesNYMachine Key (Square & Rectangular)SteelPlain3/16 x 1 1/43/16 x 1-1/4 sqr key500
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