• The Fuji Bearing Locknut or Spring Stop Nut where the locking function is performed by a spring peened into the top of the nut. The nut therefore remains locked in position. This nut works Similar to a nylon insert lock nut, however, using a metal insert instead of nylon makes this nut far superior for anti-vibration applications.

Similar to Polaris 7547177, NN10X1.25YLW, Staytite