S-90521A106 1/4"-20 ASTM A194 Hex Nuts

Key Features & Benefits at a Glance

• Exceptional load distribution with extra wide hex profile for reduced surface pressure and minimized risk of loosening under vibration
• Superior strength performance meeting ASTM Grade 2H requirements for high-stress industrial applications
• Reliable coarse threading with UNC 1/4"-20 specification providing faster assembly and resistance to cross-threading
• Precise Class 2B thread fit ensuring smooth engagement and consistent torque performance
• Enhanced corrosion resistance through high-quality steel construction with RoHS 3 and REACH compliance
• Optimized external hex drive design for secure tool engagement and efficient installation
• Right-hand thread configuration for standard clockwise tightening in conventional assembly operations

Professional Applications & Engineering Value

This heavy-duty hex nut delivers exceptional performance in demanding industrial environments where vibration resistance and structural integrity are critical. The ASTM A194 compliant steel construction combined with the extra wide hex profile provides superior clamping force distribution, effectively preventing joint failure in machinery, structural steel connections, and heavy equipment assemblies. The 1/4"-20 UNC coarse thread specification offers excellent debris resistance and faster installation times, while the Class 2B thread fit ensures consistent torque-tension relationships. Engineered for applications requiring Grade 2H strength certification, this nut maintains reliable performance in construction, manufacturing, and automotive sectors where safety and durability are paramount concerns.

Specification Summary & Compliance

This hex nut features precise Class 2B thread fit per UNC standards with 1/4"-20 coarse thread spacing and right-hand thread direction. Manufacturing complies with ASTM A194 specifications and meets ASTM Grade 2H strength requirements. Dimensions include 1/2" width and 15/64" height. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global industrial markets.