S-90521A041 1 1/2"-8 ASTM A194 Hex Nuts

Key Features & Benefits at a Glance

• Exceptional Load Distribution thanks to the extra wide profile, reducing stress concentration and preventing joint failure in heavy-duty applications
• Guaranteed High-Strength Performance with ASTM Grade 2H certification, ensuring reliable performance under extreme tension and vibration
• Superior Thread Engagement with UN Class 2B coarse threads, providing easier assembly and reduced risk of cross-threading in field service
• Enhanced Durability & Corrosion Resistance from premium steel construction, offering long service life in harsh industrial environments
• Optimized for High-Torque Applications featuring a 2 3/8" external hex drive for secure wrenching and minimal slipping
• Global Regulatory Compliance meeting RoHS 3 and REACH standards, ensuring safe use in international markets and environmentally sensitive projects
• Reliable Interchangeability with standard 1 1/2"-8 coarse thread components, simplifying inventory management and replacement procedures

Professional Applications & Engineering Value

This heavy-duty hex nut delivers critical engineering solutions where standard fasteners fail. The ASTM Grade 2H certified steel construction provides exceptional clamp load retention, making it ideal for structural steel connections, heavy machinery assembly, and infrastructure projects subject to dynamic loads and vibration. The extra wide profile significantly increases bearing surface area, distributing forces more effectively to prevent material deformation and joint loosening. With UN coarse threads and Class 2B thread fit, installation becomes faster and more reliable even in challenging field conditions, while the right-hand threading maintains compatibility with standard industrial equipment. This nut effectively addresses common failure points in construction, mining, and transportation equipment where vibration resistance and long-term reliability are paramount.

Specification Summary & Compliance

Manufactured to ASTM A194 specifications with ASTM Grade 2H strength certification. Features 1 1/2"-8 UNC coarse threads with Class 2B thread fit tolerances for optimal engagement. Dimensions include 2 3/8" width across flats and 1 15/32" height. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring unrestricted use in global markets.