Midwest Fastener 1/4 in.-20 Coarse Top Lock Nut

The Midwest Fastener 1/4 in.-20 Coarse Top Lock Nut is designed to provide secure, vibration-resistant fastening in a wide range of mechanical, automotive, and hardware applications. Its all-metal locking feature creates prevailing torque to prevent loosening during operation, ensuring long-lasting joint stability. Manufactured from Grade 2 steel and treated with a zinc finish, this top lock nut delivers dependable strength and enhanced protection against rust and corrosion. It is ideal for structural assemblies, equipment maintenance, and general-purpose fastening where durable retention is essential.