The Hillman Group 3347 7/16-14 Top Lock Nut Zinc Plated, 10-Pack

ALL-METAL LOCKING, NO NYLON: This lock nut grips the bolt with a distorted all-metal top instead of a nylon insert, so it resists vibration and also holds up to high heat that would melt or weaken a nylon-insert lock nut over time. | DISTORTED TOP GRIPS THE BOLT: Fitting a 7/16-14 coarse bolt, the slightly deformed top threads press against the bolt with metal-on-metal friction as the nut drives on, resisting loosening while the hex flats take a wrench. | ZINC-PLATED STEEL: Made from steel with a protective zinc plating, the nut resists rust and corrosion for dependable indoor and light outdoor use, keeping its all-metal locking grip through heat, vibration, and repeated service. | EXHAUST AND ENGINE USE: Ideal for exhaust systems, engines, manifolds, and high-heat machinery where a nylon-insert nut would fail, a dependable heat-resistant locking nut for automotive, equipment, and demanding repair work. | TRUSTED HILLMAN QUALITY: Hillman supplies dependable fasteners and hardware that homeowners and pros rely on for everyday projects. Keep these nuts on hand for assembly, mounting, and repair jobs around the home and shop.