12MM Allen Key

12MM Allen Key - Transmission and Differential Plugs

12mm Allen key (internal hex drive) as used by Alfa on many fill and drain plugs on transmissions, transaxles, and differentials. Also used on oil drain plug on some late Spiders and 164s.

Check size needed before ordering - some cars used 14mm Allen keys, and many cars have replacement plugs which may have different sizes than original. For 14mm Allen key, see our part number TL120.