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5/16 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.

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SupplierLocTypeMaterialFinishSizeDescriptionQty 
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)SteelPlain5/16 x 1key machine square263
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EndriesWIMachine Key (Square & Rectangular)SteelPlain5/16x1-3/4 square machine key undersized plain |65
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EndriesWIMachine Key (Square & Rectangular)SteelPlain5/16 x 3 sq machine key type-a200
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NAPPCOTXMachine Key (Square & Rectangular)SteelZinc/Clear5/16 x 5/16 x 365/16 x 5/16 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)2
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ManscoMIMachine Key (Square & Rectangular)SteelPlain5/16 x 5/16 x 4-1/8 square key pln260
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ManscoMIMachine Key (Square & Rectangular)SteelPlain5/16 x 5/16 x 2 square key pln140
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ManscoMIMachine Key (Square & Rectangular)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/16 x 5/16 x 1-1/2 square key 18-8 s.s.101
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LibertyILMachine Key (Square & Rectangular)SteelZinc/Clear5/16 x 12square key zinc5
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LibertyILMachine Key (Square & Rectangular)SteelPlain5/16 x 2square key15
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LibertyILMachine Key (Square & Rectangular)SteelPlain5/16 x 1 1/2long special square key with .039 chamer on 2 corners per print per print200
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Field FasILMachine Key (Square & Rectangular)SteelPlain5/16 x 3/8 x 2 1/4 rectangular key undersize stl pln188
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SWACOOHMachine Key (Square & Rectangular)SteelPlain5/16 x 5/16 x 12sq key 5/16x5/16x12 cs pln4
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SWACOOHMachine Key (Square & Rectangular)SteelPlain5/16 x 5/16 x 15/16x5/16x1 cut key39
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NutsBoltsNEMachine Key (Square & Rectangular)SteelPlain5/165/16 square snap wire pin443
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MidStatesMIMachine Key (Square & Rectangular)SteelPlain5/16 x 5/16machinery key-both ends rnd2
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MidStatesMIMachine Key (Square & Rectangular)SteelPlain5/16 x 5/16machinery key-both ends rnd3
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IPCVAMachine Key (Square & Rectangular)SteelPlain5/16 x 1 11/165/16x1 11/16 sq. key one end rnd. c of c req. (jg1-5/16x27) per mes-0007 spec196
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WDMBIAMachine Key (Square & Rectangular)SteelPlain5/16 x 5/16 x 2key mach us sq b 5/16x5/16x2315
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WDMBIAMachine Key (Square & Rectangular)SteelPlain5/16 x 2 3/4key gib st 1018 (pl) 5/16x2 3/4 drw (W0S0)292
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ISSCOMOMachine Key (Square & Rectangular)Grade 2Plain5/16 x 5/16 x 1 1/2square-.001/.000800
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ISSCOMOMachine Key (Square & Rectangular)Grade 2Plain5/16 x 5/16 x 1 1/4square-.001/.000750
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ISSCOMOMachine Key (Square & Rectangular)Grade 2Plain5/16 x 5/16 x 2square +.001/.0002685
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ISSCOMOMachine Key (Square & Rectangular)Grade 2Plain5/16 x 5/16 x 2 1/2square +.001/.000800
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ISSCOMOMachine Key (Square & Rectangular)SteelPlain5/16 x 1 1/4gib head key 5/16 taper505
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ISSCOMOMachine Key (Square & Rectangular)SteelPlain5/16 x 1 3/4gib head key 5/16 taper450
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ISSCOMOMachine Key (Square & Rectangular)SteelPlain5/16 x 1 1/2gib head key 5/16 taper2440
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ISSCOMOMachine Key (Square & Rectangular)SteelPlain5/16 x 2 3/4gib head key 5/16 taper455
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PENCOMOntMachine Key (Square & Rectangular)SteelPlain5/16 x 5/16 x 25/16x5/16x2 machine key stl pln80
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NAPPCOTXMachine Key (Square & Rectangular)SteelZinc/Clear5/16 x 5/16 x 365/16x5/16x36 square key zp rohs2
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OBRIENOHMachine Key (Square & Rectangular)300 Stainless (A1,A2, 18-8,304,310 etc.)Plain5/16 x 5/16 x 1'5/16 x 5/16 x 1 ft kystk s/s2
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WurthINMachine Key (Square & Rectangular)SteelPlain5/16 x 5/16 x 1 1/25/16 x 5/16 x 1-1/2 gib head key steel 522725230
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