Nylon Insert Hex Lock Nut 18 8 Stainless Steel Black Oxide and Oil

Designed to be used with like-material machine screws and bolts. It is able to be reused more times than a two-way reversible nut. Steel nylon insert stop nuts are less expensive than grade-C automation lock nuts. However, nylon will begin to deteriorate at temperatures from 150Ëš-350Ëš F