12mm Keys | McMaster-Carr

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Stainless Steel

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91 Products

Machine Keys

Rounded Machine Keys

Rounded Machine Keys

Fill oval keyways completely, reducing stress on the key and shaft

Machine Keys

Install in keyways to transmit torque from shafts to gears and other components

Tapped Rounded Machine Keys

Tapped Rounded Machine Keys

Thread a screw through the tapped hole to pop these keys out of a keyway

Other Products

Machine Key Stock

Machine Key Stock

Cut a custom length to transfer torque from shafts to components such as gears and sprockets

Fixture Keys

Locate fixtures and vises on your machine table

The quick brown fox jumped over the lazy dog. Pedestal (35" Ht. x 4" Wd. x 4" Dp.)