TVR E1228
K-nut M12
M12 flanged k-nut self locking nut. This nut is used in a number of applications in the Speed 6 and AJP V8 engine, it secure the drive sprockets to the shafts on the oil pump, scavenge pump and water pump as well as the main bearing caps. Should be replaced if dismantled to ensure the self locking qualities are maintained.