S-91026A038 1"-8 ASTM A194 Hex Nuts

Key Features & Benefits at a Glance

• Exceptional corrosion resistance through black-oxide steel coating, extending service life in harsh industrial environments
• Superior clamping force distribution with extra-wide heavy hex profile for enhanced joint integrity under heavy loads
• High-strength performance meeting ASTM Grade 2H requirements for demanding structural applications
• Reliable coarse threading with 1"-8 UNC Class 2B fit for faster assembly and reduced cross-threading risks
• Comprehensive regulatory compliance with RoHS 3 and REACH standards for global manufacturing acceptance
• Optimized external hex drive design for secure tool engagement and efficient installation
• Rigorous quality assurance through ASTM A194 specifications ensuring consistent dimensional accuracy

Professional Applications & Engineering Value

Engineered for heavy-duty industrial applications, this Grade 2H black-oxide steel heavy hex nut delivers critical performance advantages where vibration resistance and long-term reliability are paramount. The extra-wide profile significantly increases bearing surface area, distributing clamping forces more effectively to prevent joint loosening in structural steel connections, heavy machinery, and infrastructure projects. The 1"-8 UNC coarse thread configuration enables rapid assembly in field conditions while maintaining secure fastening, complemented by the black-oxide finish that provides essential corrosion protection in demanding environments. This combination of high-strength material properties and optimized geometric design addresses common failure points in industrial fastening systems, offering engineers a reliable solution for applications requiring sustained clamping force and durability.

Specification Summary & Compliance

This heavy hex nut features precision Class 2B thread fit with 1"-8 UNC coarse threading and right-hand direction. Manufactured from high-strength steel with black-oxide coating, it complies with ASTM A194 manufacturing standards and meets ASTM Grade 2H strength requirements. Dimensional specifications include 1 5/8" width and 63/64" height for the extra-wide profile. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring suitability for global industrial applications requiring strict material composition controls.