S-90521A108 5/16"-24 ASME B18.2.2, ASTM A194 Hex Nuts

Key Features & Benefits at a Glance

• Enhanced load distribution through the extra wide hex profile, reducing stress concentration and preventing joint failure in high-vibration applications
• Superior thread engagement with Class 2B fit and UNF fine threads ensuring precise, secure fastening and minimizing loosening risks
• Exceptional strength performance meeting ASTM Grade 2H requirements for heavy-duty industrial applications requiring reliable clamping force
• Standard compliance assurance with ASME B18.2.2 and ASTM A194 specifications guaranteeing dimensional accuracy and material quality
• Environmental regulation compliance with RoHS 3 and REACH standards making it suitable for regulated industries and export markets
• Optimized wrench engagement with 9/16" width providing superior torque transmission and reducing tool slippage during installation
• Right-hand thread design offering compatibility with standard assembly procedures and replacement part inventories

Professional Applications & Engineering Value

This Grade 2H heavy-duty hex nut delivers critical engineering solutions where vibration resistance and load distribution are paramount. The extra wide profile significantly increases bearing surface area, effectively distributing clamp load across wider surfaces to prevent material deformation in soft substrates or under dynamic loading conditions. Manufactured from high-strength steel and featuring 5/16"-24 UNF fine threads, this fastener maintains tension integrity in machinery, structural assemblies, and automotive applications where fine adjustment and vibration resistance are essential. The Class 2B thread fit ensures consistent engagement with mating components, reducing the risk of cross-threading during high-volume assembly operations while providing reliable performance in temperature-fluctuating environments common in industrial settings.

Specification Summary & Compliance

This hex nut maintains precise Class 2B thread fit tolerances per UNF standards with dimensions of 9/16" width and 19/64" height. Manufacturing complies with ASME B18.2.2 dimensional specifications and ASTM A194 material requirements for Grade 2H heavy-duty applications. The product meets RoHS 3 (2015/863/EU) compliance for hazardous substance restrictions and REACH (EC 1907/2006) standards for chemical safety, ensuring suitability for global industrial markets and environmentally conscious manufacturing operations.