S-90623A200 5/8"-18 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through two-piece clamp locking technology that maintains tension under extreme conditions
• Reliable thread engagement with Class 2B thread fit ensuring consistent performance and easy assembly
• Enhanced torque application with standard external hex drive design for secure installation using common tools
• Durable steel construction providing excellent strength and corrosion resistance for long service life
• Precision UNF fine threading (5/8"-18) offering better load distribution and superior sealing capabilities
• Full regulatory compliance with RoHS 3 and REACH standards for safe use in regulated industries
• Right-hand thread orientation for standard installation procedures and compatibility with existing systems

Professional Applications & Engineering Value

This heavy-duty steel locknut addresses critical vibration-induced loosening challenges in industrial machinery, automotive assemblies, and heavy equipment applications. The two-piece clamp locking mechanism creates continuous radial pressure that resists rotational forces, making it ideal for high-vibration environments where standard nuts would fail. The UNF fine thread configuration (5/8"-18) provides increased thread contact area, distributing stress more evenly and enhancing joint integrity. Manufactured from high-grade steel with precise Class 2B thread fit, this external hex locknut ensures reliable performance in critical fastening applications while maintaining compliance with international environmental and safety standards.

Specification Summary & Compliance

This locknut features Class 2B thread fit per UNF standards with 5/8"-18 fine threading and right-hand thread direction. Dimensions include 15/16" width across flats and 55/64" height. The product fully complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and regulatory acceptance for industrial applications worldwide.