S-90640A145 5/16"-24 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance with nylon insert locking technology that maintains secure fastening even under continuous motion
• Enhanced durability in high-temperature environments with nylon insert rated for reliable performance up to 220°F
• Precision thread engagement through Class 2B thread fit ensuring consistent, reliable installation
• Corrosion-resistant protection with zinc-plated steel construction for extended service life in harsh conditions
• Easy installation and removal with standard external hex drive design compatible with common tools
• Fine thread optimization with 5/16"-24 UNF configuration providing superior holding power in critical applications
• Regulatory compliance assurance meeting RoHS 3 and REACH standards for industrial safety requirements

Professional Applications & Engineering Value

This 5/16"-24 UNF nylon insert locknut delivers exceptional engineering value in applications where vibration-induced loosening poses significant reliability concerns. The zinc-plated steel construction provides essential corrosion resistance while the nylon insert creates consistent friction that maintains clamp force without damaging mating threads. Particularly valuable in industrial machinery, automotive assemblies, and electrical enclosures, this external hex locknut combines the installation convenience of standard wrenching with the security of specialized locking technology. The fine thread configuration offers superior resistance to vibrational loosening compared to coarse threads, making it ideal for precision equipment subject to dynamic loads. With temperature resilience up to 220°F, this fastener maintains integrity in environments where thermal cycling would compromise lesser locking mechanisms.

Specification Summary & Compliance

This locknut features precision Class 2B thread fit per UNF standards with 5/16"-24 fine thread configuration and right-hand thread direction. Manufactured to exacting dimensional specifications including 1/2" width across flats and 11/32" height. The product demonstrates full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring adherence to current industrial safety and environmental standards for hazardous substance restrictions.