S-96278A515 1/4"-28 Locknuts

Key Features & Benefits at a Glance

• Maximum vibration resistance through integrated external-tooth lock washer that maintains consistent clamping force in high-motion environments
• Superior corrosion resistance with 18-8 stainless steel construction ensuring long-term reliability in harsh industrial conditions
• Precision fine threading (1/4"-28 UNF) provides enhanced load distribution and superior resistance to loosening under stress
• Dual-material durability combining 18-8 stainless steel nut body with 400 stainless steel washer for optimal performance across components
• Industry-standard compatibility with Class 2B thread fit ensuring reliable engagement with mating components
• Easy installation and removal with standard 7/16" external hex drive profile compatible with common wrenching tools
• Regulatory compliance assurance meeting both REACH and RoHS 3 standards for safe use in regulated industries

Professional Applications & Engineering Value

This 1/4"-28 UNF locknut with integrated external-tooth lock washer addresses critical vibration-induced failure points in industrial assemblies. The 18-8 stainless steel construction provides exceptional corrosion resistance for applications exposed to moisture, chemicals, or outdoor elements, while the 400 stainless steel washer maintains consistent locking force through its tooth design that bites into mating surfaces. Engineered with Class 2B fine threads, this external hex drive locknut delivers precise fitment in machinery, automotive, and aerospace applications where vibration resistance and thread integrity are paramount. The combination of materials and locking mechanism ensures reliable performance in high-stress environments while maintaining compliance with international safety standards.

Specification Summary & Compliance

This precision locknut features 1/4"-28 UNF fine threads with Class 2B thread fit tolerance for consistent mating performance. The external hex drive measures 7/16" across flats with a total height of 15/64". Manufactured in compliance with REACH (EC 1907/2006) and RoHS 3 (2015/863/EU) standards, ensuring environmental safety and regulatory compliance for industrial applications. The locking system incorporates an external-tooth lock washer with 0.5" outer diameter manufactured from 400 series stainless steel for enhanced durability and corrosion resistance.