S-90580A366 7/8"-9 ASTM A563 Hex Nuts

Key Features & Benefits at a Glance

• Enhanced load distribution through extra wide profile design, reducing stress concentration and preventing surface damage in heavy-duty applications
• Superior corrosion resistance with black-oxide steel coating, extending service life in demanding industrial environments
• Reliable thread engagement with Class 2B thread fit, ensuring consistent fastening performance and vibration resistance
• High-strength performance meeting ASTM Grade C requirements, providing dependable mechanical properties for structural applications
• Easy installation and removal with standard external hex drive design, compatible with common wrench tools
• Environmental compliance with RoHS 3 and REACH regulations, ensuring safe use across global industrial markets
• Optimized for coarse threading with 7/8"-9 UNC specification, delivering faster assembly and reduced cross-threading risks

Professional Applications & Engineering Value

Engineered for heavy-duty industrial applications, these extra wide hex nuts provide critical solutions where vibration resistance and load distribution are paramount. The black-oxide steel construction offers superior protection against corrosion in harsh environments, while the ASTM Grade C certification ensures consistent mechanical performance under high stress conditions. The 7/8"-9 UNC coarse thread configuration enables rapid assembly in construction, machinery, and structural steel applications, reducing installation time while maintaining Class 2B thread fit precision. The extra wide profile distributes clamping force over a larger surface area, preventing material deformation and maintaining joint integrity in industrial fastening systems subjected to dynamic loads and thermal cycling.

Specification Summary & Compliance

This hex nut features precise Class 2B thread fit tolerance with 7/8"-9 UNC coarse thread specification, manufactured in compliance with ASTM A563 standards. The component meets ASTM Grade C strength requirements with dimensions of 1 7/16" width and 55/64" height. Environmental compliance is verified through RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) certifications, ensuring unrestricted use in global industrial markets. The right-hand thread direction and inch system measurement provide compatibility with standard industrial fastening applications requiring reliable, high-strength connections.