5/16 in.-18 Grade 8 Nylon Insert Locknut Zinc Yellow (100 per Pack)

Grade 8 Nylon Insert Lock Nuts Zinc Yellow: Hex nut with a nylon-filled collar. When a screw reaches the collar, the threads and nylon form a tight, frictional fit, restricting movement of the screw when subjected to vibration. Designed to be used with like material machine screws and bolts. It is able to be reused. Nylon will begin to deteriorate at temperatures from 150 degree F to 350 degree F.|Zinc yellow plated|Material: steel|Sold in packs of 100|Coarse thread