Prevailing Torque Lock Nuts (commonly known as stover hex lock nuts) made of high quality zinc plated Grade C steel. Grade C steel is equal to Grade 8, and undergoes the same hardening process before the stover nuts are zinc plated.Prevailing Torque Lock Nuts, or Stover Cone Lock Nuts are available in various sizes in both Coarse (UNC) and Fine (UNF) threads. Stover Lock Nuts are Grade C Steel with a Zinc Plated and wax treated finish.
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