S-90580A345 1 1/4"-7 ASTM A563 Hex Nuts

Key Features & Benefits at a Glance

• Enhanced load distribution through extra wide profile design, reducing stress concentration and preventing joint failure
• Superior mechanical strength with ASTM Grade C certification, ensuring reliable performance in demanding applications
• Quick installation efficiency with coarse UNC threads and Class 2B fit, enabling faster assembly while maintaining secure engagement
• Exceptional durability from high-quality steel construction, providing long-term corrosion resistance and structural integrity
• Broad compatibility with standard 1 1/4"-7 UNC male threads, making it ideal for replacement and new construction projects
• Regulatory compliance assurance meeting RoHS 3 and REACH standards, ensuring environmental safety and global market acceptance
• Optimized torque transmission with external hex drive style, allowing for secure tightening with common industrial tools

Professional Applications & Engineering Value

This heavy-duty hex nut delivers exceptional engineering value in industrial settings where vibration resistance and load distribution are critical. The extra wide profile significantly increases bearing surface area, effectively distributing clamp load across wider surfaces to prevent material deformation in soft substrates. Manufactured from ASTM A563 Grade C steel, this component maintains structural integrity under extreme tension and shear forces commonly encountered in construction equipment, heavy machinery, and structural steel frameworks. The 1 1/4"-7 UNC coarse thread configuration ensures rapid installation while providing sufficient thread engagement for secure fastening, even in environments with moderate vibration. The Class 2B thread fit offers optimal balance between assembly ease and retention security, making this nut particularly valuable for maintenance operations and production line applications where downtime reduction is essential.

Specification Summary & Compliance

This hex nut features precise Class 2B thread fit per UNC standards with 1 1/4"-7 coarse thread spacing and right-hand thread direction. Manufactured in compliance with ASTM A563 specifications for dimensional accuracy and mechanical properties, certified to ASTM Grade C strength requirements. The component meets RoHS 3 (2015/863/EU) compliance for hazardous substance restrictions and REACH (EC 1907/2006) standards for chemical safety, with dimensions of 2" width and 1 7/32" height ensuring proper tool engagement and installation clearance.