Nylon Insert Locknuts Heavy, National Coarse

Nylon Insert Locknut Heavy NC: Heavy hex nut with a nylon-filled collar at its back end. When the cap-screw or bolt reaches the collar, the threads and nylon form a tight, frictional fit, restricting movement of the cap-screw or bolt with it is subjected to vibration. The nylon insert comes in various colors. Has greater surface area than NM-series nuts, making wrenching easier. Designed to be used with cap-screws and bolts which have a minimum tensile strength not greater than 90,000 psi. Used in bridge and building construction, material handling, heavy equipment and oil field machinery. Steel nylon insert stop nuts are less expensive than grade-C automation lock nuts. Nylon insert nuts are not designed to be used at temperatures over 250 degrees Fahrenheit. *ZB - BLUE ZINC