S-92501A440 1/2"-20 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through top-distorted thread technology that maintains clamp force in high-stress environments
• Enhanced corrosion protection with cadmium-plated steel construction for extended service life in industrial conditions
• Reliable reusability with Class 2B thread fit ensuring consistent performance through multiple installation cycles
• Heavy-duty load capacity meeting ASTM Grade C standards for demanding mechanical applications
• Precision fine threading (1/2"-20 UNF) providing superior resistance to loosening under dynamic loads
• Standard external hex design enabling easy installation with common wrench tools while maintaining secure locking
• Optimized dimensional stability with 3/4" width and 7/16" height ensuring proper fit and consistent torque values

Professional Applications & Engineering Value

This 1/2"-20 UNF top lock nut delivers critical vibration resistance where conventional fasteners fail. The distorted thread technology creates controlled interference that prevents rotational loosening in high-vibration environments such as heavy machinery, automotive assemblies, and industrial equipment. Manufactured from cadmium-plated steel, the nut provides excellent corrosion resistance while maintaining the mechanical strength required for ASTM Grade C applications. The fine thread spacing and Class 2B thread fit ensure precise engagement with mating components, delivering reliable performance in critical joints subject to dynamic loading and thermal cycling. This engineering solution addresses the fundamental challenge of maintaining preload in vibrating systems while offering the durability needed for industrial maintenance and manufacturing applications.

Specification Summary & Compliance

This locknut features 1/2"-20 UNF fine threads with Class 2B thread fit per Unified National Fine standards. The top lock distorted thread design provides consistent locking performance while maintaining dimensional accuracy. Manufactured from cadmium-plated steel and certified to ASTM Grade C mechanical properties, this external hex locknut meets industrial standards for heavy-duty applications. The product complies with relevant industry specifications for dimensional tolerances and material performance requirements.