Shift Knob Jam Nut : M12 x 1.75 for 1979-2004 Mustang

*** This nut is included with knobs we sell (where applicable) so do not buy this item unless you want a spare! *** Jam nut for shifter knobs and handles with M12 x 1.75 thread: Mild steel w/ black oxide finish Round w/ two machined flats for wrench 21mm outside diameter (~ 13/16") 19mm across flats (~ 3/4") 10mm tall (~ 3/8") Intended for aftermarket classic knobs & T-handles w/ ~1/8" recessed mount NOT compatible with OE knobs This thread size is found on the following manual trans applications in OE configuration: 1979-2004 Ford Mustang 1983-1988 Ford Thunderbird Turbo Coupe 1989-1995 Ford Thunderbird Super Coupe 1979-1986 Mercury Capri 1983-1990 Mercury Cougar XR-7 Does NOT FIT most Hurst sticks (except #5197 & 5202) CONFIRM THREAD SIZE before you buy! Other sizes available