S-92501A531 9/16"-12 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through distorted top lock threads that maintain secure fastening in high-motion environments
• Enhanced corrosion protection with zinc-plated steel construction for extended service life in industrial conditions
• Reliable mechanical performance meeting ASTM Grade C specifications for consistent strength in demanding applications
• Quick installation compatibility with standard 7/8" external hex drive for common wrench and socket tools
• Precise thread engagement with Class 2B fit UNC coarse threads ensuring smooth assembly and reduced cross-threading risk
• Environmental compliance assurance through REACH and RoHS 3 certification for safe industrial usage
• Optimized locking performance with right-hand distorted thread design that increases with vibration rather than loosening

Professional Applications & Engineering Value

This 9/16"-12 UNC locknut with distorted thread top lock technology addresses critical vibration-induced loosening challenges in heavy machinery, automotive assemblies, and structural frameworks. The zinc-plated steel construction provides essential corrosion resistance while maintaining the ASTM Grade C mechanical properties required for high-stress applications. The coarse thread design enables faster installation in field maintenance scenarios, while the external hex drive profile ensures compatibility with standard industrial tools. Engineers specify this locking solution for equipment subjected to continuous motion, where traditional fasteners would require frequent retorquing, significantly reducing maintenance downtime and improving operational safety.

Specification Summary & Compliance

This locknut features 9/16"-12 UNC coarse threads with Class 2B thread fit tolerance for precise engagement. Manufacturing conforms to ASTM Grade C standards for mechanical properties and dimensional accuracy. The product is fully compliant with REACH (EC 1907/2006) and RoHS 3 (2015/863/EU) environmental regulations. Physical dimensions include 7/8" width across flats and 31/64" height, with right-hand thread direction and external hex drive style for standard tool compatibility.