Nylon Insert Lock Nuts, NE Series, 316 Stainless

STAINLESS 316 NYLON INSERT LOCKNUT (INCH)

Nylon inset lock nuts are basically a hex nut with a nylon-filled collar at its back end. When a screw reaches the collar, the threads and nylon form a tight, frictional fit, restricting movement of the screw when it's subject to vibration.