S-90098A115 5/16"-18 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through nylon insert locking mechanism for secure, long-term fastening in high-motion applications
• Excellent corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments
• Precise thread engagement with Class 3B UNC coarse threads ensuring reliable fit and reduced cross-threading risk
• Enhanced temperature tolerance with nylon insert rated to 250°F for stable performance in thermal cycling conditions
• Optimized installation profile featuring extra-wide thin design for space-constrained applications while maintaining strength
• Secure external hex drive providing positive tool engagement and consistent torque application
• Comprehensive regulatory compliance meeting RoHS 3 and REACH standards for global industrial use

Professional Applications & Engineering Value

This 5/16"-18 nylon insert locknut delivers critical vibration-resistant performance for demanding industrial applications where secure fastening is paramount. The 18-8 stainless steel construction provides exceptional corrosion resistance in challenging environments, from marine equipment to chemical processing facilities. The Class 3B UNC coarse thread specification ensures precise mating with mating components while the nylon insert creates consistent locking force without damaging threads. The extra-wide thin profile offers superior bearing surface in space-limited assemblies, making it ideal for machinery, automotive, and electrical enclosures where vibration-induced loosening can compromise system integrity. With temperature resistance to 250°F, this locknut maintains performance stability across thermal cycling conditions common in industrial operations.

Specification Summary & Compliance

This locknut features 5/16"-18 UNC coarse threads with Class 3B thread fit for precision engagement. The external hex drive style ensures reliable torque application while the nylon insert provides consistent locking performance. Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming environmental and safety standards for industrial fastener applications. Dimensions include 9/16" width and 5/16" height with right-hand thread direction.