3/4-10 Nylon Insert Hex Locknut Grade 8 Zinc Yellow, Pkg of 50

5/16-18 Nylon Insert Flange Stop Hex Lock Nut Zinc. Hex head screws are designed to be driven by a wrench or pneumatic tools.

1 1/4-12 Thin Pattern Nylon Insert Hex Lock Nut Fine Thread Zinc Yellow. Hex head screws are designed to be driven by a wrench or pneumatic tools.

1/4-20 Nylon Insert Flange Stop Hex Lock Nut Zinc. Hex head screws are designed to be driven by a wrench or pneumatic tools.

Nylon Lock Nuts contain a nylon collar insert to help prevent turning. The insert deforms elastically over screw threads. The nylon insert applies a compressive force against the screw to lock the nut.

Lock nuts remain stiff when placed on bolts. They are useful in applications where vibration may cause a fastener to come loose. Lock nuts are also able to be used to keep other nuts in place by threading over them.