Pinion nut for GM 12 bolt car & truck, 55-62 car & truck, 8.2, 8.2 Buick/Olds/Pontiac & 63-79 Corvette. 1 1/8 socket, 7/8 x 16 thread. Product Features:Pinion nut for GM 12 bolt car and truck, 8.2, 8.2 Buick, Oldsmobile and Pontiac and 1963-1979 Corvette7/8 x 16 thread1 1/8 socket
