S-96278A523 5/16"-24 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through integrated external-tooth lock washer design that maintains secure locking under dynamic loads
• Excellent corrosion resistance with 18-8 stainless steel construction for long-lasting performance in harsh environments
• Precise thread engagement with Class 2B thread fit ensuring reliable fastening and consistent torque performance
• Enhanced locking reliability combining 400 stainless steel washer with external hex drive for maximum clamping force
• Fine thread advantage with 5/16"-24 UNF configuration providing better tension control and vibration resistance
• Regulatory compliance assurance meeting both REACH and RoHS 3 standards for industrial safety requirements
• Optimized washer design with 0.578" OD external-tooth lock washer creating positive locking action

Professional Applications & Engineering Value

This 5/16"-24 UNF locknut with external-tooth lock washer addresses critical vibration-induced loosening challenges in industrial machinery, automotive assemblies, and heavy equipment. The 18-8 stainless steel construction provides exceptional corrosion resistance while maintaining mechanical strength, making it ideal for applications exposed to moisture, chemicals, or outdoor elements. The Class 2B thread fit ensures precise mating with UNF threaded components, delivering consistent clamping force and preventing thread damage during repeated installations. The integrated 400 stainless steel washer with external teeth bites into mating surfaces, creating a positive mechanical lock that outperforms standard nuts in high-vibration environments. This combination of materials and design makes it particularly valuable for industrial locknut applications where reliability and durability are paramount.

Specification Summary & Compliance

This heavy-duty locknut features 5/16"-24 UNF fine threads with Class 2B thread fit for precision engagement, right-hand thread direction, and standard hex profile with external drive. The assembly includes an external-tooth lock washer manufactured from 400 series stainless steel with 0.578" outer diameter. The fastener system complies with REACH (EC 1907/2006) regulations and meets RoHS 3 (2015/863/EU) standards, ensuring environmental and safety compliance for industrial applications.