Nylon Insert Lock Nut - Coarse Thread
Nylon Hex Lock Nut Zinc: Coarse Thread
A six sided internally threaded nut with a nylon collar on the back side. When a bolt engages with the collar, the threads and nylon form a tight fit, restricting movement of the bolt. These nuts are low carbon steel designed to be used with low carbon steel bolts. They are a good choice if using in a situation where vibration exists.