This is a new rotor nut and fits Triumph 500 twins (Daytona, T100R, T100C, T100S, etc) from 1969-1974 only. At 9/16 20 TPI UNF this sleeve nut retains the rotor to the crankshaft. Torque down tightly and retain with a tab washer (PN# 70-3975) to prevent it from loosening. This nut is sold individually.
Please refer to your parts catalog for proper fitment.
