S-96278A531 3/8"-24 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through integrated external-tooth lock washer design that maintains clamping force in high-shock environments
• Excellent corrosion resistance with 18-8 stainless steel construction and 400 stainless steel washer for extended service life in harsh conditions
• Precise thread engagement with Class 2B thread fit ensuring reliable, consistent performance in critical assemblies
• Enhanced locking security from the external-tooth washer that bites into mating surfaces to prevent loosening
• Industry-standard compatibility with 3/8"-24 UNF fine threads for seamless integration into existing systems
• Environmental compliance assurance meeting both REACH and RoHS 3 standards for global industrial applications
• Optimized installation efficiency with standard 9/16" hex profile allowing for quick assembly using common tools

Professional Applications & Engineering Value

This 3/8"-24 UNF locknut with external-tooth lock washer addresses critical vibration-induced failure points in industrial machinery and equipment. The combination of 18-8 stainless steel construction and 400 stainless steel washer provides dual corrosion protection while the external teeth create positive locking action that resists rotational forces. Engineered with Class 2B thread fit and fine threading, this heavy-duty fastener delivers reliable performance in automotive assemblies, manufacturing equipment, marine applications, and aerospace components where vibration resistance and material integrity are paramount. The right-hand thread direction ensures compatibility with standard industrial components while the integrated locking mechanism eliminates the need for additional anti-vibration hardware.

Specification Summary & Compliance

This precision locknut features 3/8"-24 UNF fine threads with Class 2B thread fit tolerance for optimal engagement. The external hex drive measures 9/16" across flats with a total height of 25/64". Manufactured to industrial standards using 18-8 stainless steel for the nut body and 400 stainless steel for the external-tooth lock washer (0.656" OD). The product is fully compliant with REACH (EC 1907/2006) and RoHS 3 (2015/863/EU) environmental regulations, ensuring safe use across global industrial markets.