Midwest Fastener 5/16 in.-18 Stainless Steel Nylon Insert Lock Nut, 16-Pack

The Midwest Fastener 5/16 in.-18 Stainless Steel Nylon Insert Lock Nut is engineered to provide dependable holding power in demanding fastening assemblies. Built with a durable nylon collar insert, this lock nut grips the threads of the mating bolt or screw to create constant friction, effectively preventing back-off and loosening caused by severe vibration, shock, or dynamic movement. Constructed from premium stainless steel, this lock nut offers superior resistance against corrosion and rust, making it suitable for exterior, marine, agricultural, and industrial environments. Whether utilized in equipment repair, automotive assembly, or general maintenance, it ensures reliable fastening integrity and long-lasting performance.