Nylon Insert Heavy Pattern Hex Nut Zinc

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 250Ëš F.