Nylon insert locknuts

Nylon insert locknuts are available in Zinc, Stainless Steel (SS) 18-8, Grade C Zinc, and Grade 8 Yellow Zinc.

have a six-sided nut body with a nylon collar permanently embedded in the top of the nut, designed to grip the threads of a mating bolt or rod and resist loosening from vibration without damaging the fastener.

Also known as “nyloc nuts” or “prevailing torque nuts,” these fasteners use the interference fit between the nylon insert and the bolt threads to create a locking action that remains effective through repeated assembly and disassembly cycles. Their six-sided body allows for easy tightening with standard wrenches and sockets, making them a reliable choice for vibration-prone assemblies across automotive, machinery, and general construction applications.