S-91026A033 1/2"-13 ASTM A194 Hex Nuts

Key Features & Benefits at a Glance

• Superior load distribution through the extra wide hex profile, preventing surface damage and ensuring secure fastening in high-torque applications
• Exceptional corrosion resistance with black-oxide steel construction, providing durable protection against rust and environmental degradation
• High-strength performance meeting ASTM Grade 2H requirements, delivering reliable clamping force for heavy-duty industrial applications
• Precision thread engagement with Class 2B fit and UNC coarse threading, enabling quick assembly and reduced cross-threading risks
• Industry-standard compliance with ASTM A194 specifications, ensuring consistent quality and interchangeability across industrial systems
• Environmental responsibility with RoHS 3 compliance, meeting global regulatory standards while maintaining mechanical performance
• Optimized installation efficiency with standard 7/8" width and right-hand threading, compatible with common tools and assembly processes

Professional Applications & Engineering Value

Engineered for demanding industrial environments, these 1/2"-13 UNC hex nuts deliver critical performance where vibration resistance and structural integrity are paramount. The black-oxide steel construction provides superior corrosion protection without compromising the material strength, making them ideal for outdoor equipment, machinery assemblies, and structural frameworks exposed to harsh conditions. The extra wide profile significantly increases bearing surface area, distributing clamp load more effectively to prevent joint relaxation and material deformation under dynamic loads. With coarse thread spacing and Class 2B thread fit, these nuts offer faster installation while maintaining precise alignment in high-volume manufacturing and maintenance operations. Their compliance with ASTM A194 standards ensures consistent performance in pressure boundary applications, including piping systems and heavy equipment where failure is not an option.

Specification Summary & Compliance

This heavy-duty hex nut features precise 1/2"-13 UNC coarse threads with Class 2B thread fit for optimal engagement with mating components. Manufacturing complies with ASTM A194 specifications for high-temperature or high-pressure service applications, while material certification meets ASTM Grade 2H strength requirements. The product is fully RoHS 3 (2015/863/EU) compliant with exemption 6(a) for lead as an alloying element in steel, ensuring environmental regulatory adherence without compromising mechanical properties. Dimensional specifications include 7/8" width across flats and 31/64" height for standardized compatibility with industrial tooling and assembly requirements.