S-92501A534 5/8"-18 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through distorted top thread technology that maintains secure fastening in high-stress environments
• Enhanced corrosion protection with zinc-plated steel construction for extended service life in industrial conditions
• Precision thread engagement with Class 2B thread fit ensuring consistent installation and reliable performance
• High-strength performance meeting ASTM Grade C specifications for demanding mechanical applications
• Industry-standard compatibility with 5/8"-18 UNF fine thread pattern for seamless integration with existing equipment
• Easy installation and removal with standard external hex drive design compatible with common wrench tools
• Regulatory compliance assurance with REACH and RoHS 3 certifications for environmental and safety standards

Professional Applications & Engineering Value

This 5/8"-18 UNF top lock nut delivers critical vibration resistance in demanding industrial applications where loosening under dynamic loads poses significant safety risks. The distorted thread technology at the top creates consistent friction that prevents back-off, making it ideal for heavy machinery, automotive assemblies, and power transmission systems. Manufactured from zinc-plated steel, the nut provides excellent corrosion resistance while maintaining the mechanical strength required for high-stress environments. The UNF fine thread pattern offers superior load distribution compared to coarse threads, while the external hex drive ensures straightforward installation with standard tools. This combination of features addresses the primary engineering challenge of maintaining joint integrity in vibration-prone applications without requiring additional locking components.

Specification Summary & Compliance

This locknut features 5/8"-18 UNF fine threads with Class 2B thread fit for precision engagement and consistent installation torque. The distorted top lock design provides the primary locking mechanism, while the standard 15/16" hex width and 35/64" height ensure compatibility with industry-standard tools. Manufactured to ASTM Grade C specifications for mechanical performance, the nut is fully compliant with REACH (EC 1907/2006) and RoHS 3 (2015/863/EU) environmental standards, making it suitable for regulated industrial applications worldwide.