The Nuts 5/8-11 Grade 8 Hex Nylon-Insert Locknuts from Metallics West Inc are designed for secure fastening in high-stress applications. Made from Grade 8 steel, these locknuts feature a nylon insert that prevents loosening due to vibration. With a diameter of 5/8 inch and a thread pitch of 11, they are suitable for various industrial and construction uses. The hexagonal shape allows for easy installation with standard tools. Supplied in a jar of 25, these locknuts ensure reliable performance and security in demanding environments.