S-91026A035 5/8"-11 ASTM A194 Hex Nuts

Key Features & Benefits at a Glance

• Enhanced torque transmission through the extra wide profile design, preventing rounding and tool slippage during high-tension applications
• Superior load distribution with the 1 1/16" width, minimizing surface pressure and material deformation in heavy-duty assemblies
• Reliable corrosion resistance from the black-oxide steel finish, extending service life in industrial environments without compromising dimensional integrity
• Guaranteed mechanical performance through ASTM Grade 2H certification, ensuring consistent proof load and yield strength for critical connections
• Optimized assembly efficiency with Class 2B thread fit and coarse 5/8"-11 UNC threading, enabling rapid installation while maintaining vibration resistance
• Regulatory compliance assurance meeting ASTM A194 specifications and RoHS 3 directives, validating material safety and international acceptability
• Dimensional precision with 39/64" height maintaining proper thread engagement depth for secure fastening under dynamic loads

Professional Applications & Engineering Value

Engineered for demanding industrial applications, these black-oxide steel hex nuts deliver exceptional performance where vibration resistance and corrosion protection are critical. The extra wide profile significantly increases wrenching surface area, eliminating common failure points in high-torque assembly scenarios such as structural steel frameworks, heavy machinery, and transportation equipment. The ASTM Grade 2H certification provides verified mechanical properties that prevent relaxation under sustained tension, while the coarse UNC threading maintains reliable engagement in environments prone to contamination or thermal cycling. This combination of robust material properties and precision manufacturing makes these nuts ideal for OEM applications requiring documented compliance with international standards.

Specification Summary & Compliance

Manufactured to exacting standards with Class 2B thread fit tolerances ensuring consistent mating with Class 2A bolts. Complies with ASTM A194 material specifications and carries ASTM Grade 2H strength certification. Meets RoHS 3 (2015/863/EU) compliance with exemption 6(a) for lead as steel alloying element. Thread specifications conform to 5/8"-11 UNC coarse thread standards with right-hand direction. Dimensional accuracy maintained at 1 1/16" width and 39/64" height for uniform performance across production batches.