Midwest Fastener 5/16 in.-18 Coarse Top Lock Nut

The Midwest Fastener 5/16 in.-18 Coarse Top Lock Nut is engineered to deliver dependable holding strength in demanding fastening applications. Designed with a prevailing torque locking mechanism, this top lock nut resists loosening caused by vibration, dynamic loads, and everyday wear, ensuring a secure and long-lasting connection. Manufactured from Grade 2 steel with a protective zinc finish, this nut offers corrosion resistance and durability for indoor and outdoor use. It is an ideal fastening solution for automotive, agricultural, industrial, and general hardware assemblies.