![Grade A Nylon Insert Locknut, National Coarse (Bulk Carton)](http://www.sterlinghardware.com/cdn/shop/products/00250_450_33d8a903-3ac2-41f8-94f7-2f9ac80ea5eb_{width}x.jpg?v=1575439622)
Grade A Nylon Insert Locknut, National Coarse (Bulk Carton)
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 is subjected to vibration. Designed to be used with like-matter.