Midwest Fastener 3/8 in.-16 Keps Lock Nut, 16-Pack

The Midwest Fastener 3/8 in.-16 Keps Lock Nut is designed to provide secure fastening and prevent loosening caused by vibration in a wide variety of hardware, machinery, and automotive applications. Each nut features an integrated, free-spinning external tooth lock washer that bites into the mating surface to maintain tension and resist back-off. Constructed from durable Grade 2 steel with a protective zinc finish, these lock nuts offer reliable corrosion resistance and long-lasting performance for indoor and outdoor fastening needs. The coarse 3/8 in.-16 thread and standard hex body ensure smooth installation with standard tools.