S-91850A037 7/8"-9 Hex Nuts

Key Features & Benefits at a Glance

• Exceptional corrosion resistance from 316 Stainless Steel construction, ideal for harsh environments including marine and chemical processing applications
• Superior load distribution and vibration resistance due to the extra wide hex profile, reducing the risk of joint failure under heavy loads
• Reliable and quick assembly with coarse UNC threading and Class 2B fit, ensuring consistent engagement and reducing cross-threading risks
• High-strength performance for demanding industrial applications, with a substantial 1 7/16" width providing excellent torque transmission
• Enhanced durability and long service life in extreme conditions, thanks to the material's resistance to pitting and crevice corrosion
• Compliance with major environmental regulations including RoHS 3 and REACH, ensuring safe use in regulated industries and global markets
• Optimized for standard tools with external hex drive design, facilitating easy installation and removal with common wrench sets

Professional Applications & Engineering Value

This heavy-duty 7/8"-9 UNC hex nut delivers critical engineering value in applications where corrosion resistance and structural integrity are paramount. The 316 Stainless Steel material provides excellent performance in aggressive environments like offshore platforms, chemical plants, and food processing facilities, where exposure to chlorides and acidic substances is common. The extra wide profile significantly increases the bearing surface, distributing clamp load more effectively to prevent material deformation and maintain bolt preload under dynamic loads and vibration. With its coarse thread spacing and Class 2B thread fit, this nut ensures rapid assembly and reliable performance in structural steelwork, heavy machinery, and transportation equipment, reducing installation time while providing a secure, long-lasting fastening solution that minimizes maintenance intervals and downtime.

Specification Summary & Compliance

This hex nut conforms to Unified National Coarse (UNC) thread standards with a 7/8"-9 thread size and Class 2B internal thread fit for consistent dimensional accuracy. Manufacturing complies with industry standards for inch-series fasteners, featuring a right-hand thread direction and external hex drive style. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring adherence to environmental and safety requirements for industrial components.