5/8-18in UNF Grade C Prevailing Torque All Steel Lock Nut Zinc Plated

An all-metal, one-piece prevailing torque 5/8-18 hex nut. With a proof load of 150,000 PSI, this nut can be reused more times than a nylon lock nut. It can also withstand temperatures of up to 450 degrees as well as severe vibrations and shock holds. Frequently used in farm machinery as well as automotive and related metalworking industries.