S-90521A281 9/16"-12 ASME B18.2.2, ASTM A194 Hex Nuts

Key Features & Benefits at a Glance

• Enhanced load distribution through extra wide profile design for superior joint stability in heavy-duty applications
• Exceptional strength performance with ASTM Grade 2H certification ensuring reliable performance under high tension loads
• Precision coarse threading with UNC 9/16"-12 configuration and Class 2B fit for faster assembly and reduced cross-threading risks
• Rigorous quality assurance through compliance with ASME B18.2.2 and ASTM A194 manufacturing standards
• Superior corrosion resistance with RoHS 3 and REACH compliance for extended service life in demanding environments
• Optimized external hex drive design for secure tool engagement and efficient installation with standard wrenching tools
• Right-hand thread orientation providing compatibility with standard industrial fastening systems and replacement parts

Professional Applications & Engineering Value

This Grade 2H heavy-duty hex nut delivers critical engineering solutions for industrial applications requiring exceptional clamping force and vibration resistance. The 9/16"-12 UNC coarse thread configuration enables rapid assembly in structural steelwork, heavy machinery, and construction equipment, while the extra wide profile significantly increases bearing surface area to prevent material deformation and maintain joint integrity under extreme loads. Manufactured from high-strength steel and compliant with ASME B18.2.2 and ASTM A194 standards, this fastener addresses common challenges of bolt fatigue and joint relaxation in critical connections. The Class 2B thread fit ensures consistent engagement with mating components, reducing installation time and improving overall assembly reliability in industrial maintenance and OEM applications.

Specification Summary & Compliance

This heavy-duty hex nut features precision 9/16"-12 UNC coarse threads with Class 2B thread fit tolerance for optimal engagement. Dimensions include 15/16" width and 35/64" height with external hex drive configuration. The fastener meets ASME B18.2.2 dimensional specifications and ASTM A194 material requirements for heavy hex nuts. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations ensures environmental safety and restricted substance management. The ASTM Grade 2H designation confirms high-strength performance characteristics suitable for demanding industrial applications.