S-91583A633 1"-8 x 4 3/4" ASME B18.2.6, ASTM A325, ASTM F3125 Medium-Strength Steel Heavy Hex Head Screws for Structural Applications

Key Features & Benefits at a Glance

• Exceptional corrosion resistance through hot-dipped galvanized steel coating, ensuring long-term reliability in harsh environments
• Superior structural integrity with Grade A325 certification and 120,000 psi tensile strength for critical load-bearing applications
• Optimized load distribution with 3" grip length and partial threading for maximum clamping force in structural connections
• Precise installation control through external hex drive and 1 5/8" head width for secure torque application
• Reliable thread engagement with Class 2A UNC coarse threads ensuring consistent performance in vibration-prone settings
• Enhanced durability with Rockwell C19 hardness providing excellent wear resistance under repeated stress
• Broad regulatory compliance meeting ASME, ASTM, RoHS 3 and REACH standards for global project acceptance

Professional Applications & Engineering Value

These Grade A325 hex head screws deliver critical performance in structural steel connections, heavy machinery assembly, and industrial construction projects. The hot-dipped galvanized steel construction provides superior protection against environmental corrosion, while the 1"-8 UNC coarse thread configuration ensures rapid installation and reliable performance in high-vibration environments. The partially threaded design with 3" grip length concentrates clamping force precisely where needed, preventing joint loosening in dynamic load conditions. Engineered to meet rigorous ASTM A325 and ASME B18.2.6 specifications, these industrial hex screws provide the structural integrity required for critical connections in bridges, building frames, and heavy equipment where failure is not an option.

Specification Summary & Compliance

Manufactured to exacting Class 2A thread fit tolerances with 1"-8 UNC coarse thread specifications. Complies with ASME B18.2.6, ASTM A325, and ASTM F3125 structural fastener standards. Meets RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) regulations for environmental safety. Features Rockwell C19 hardness and 120,000 psi tensile strength ratings suitable for the most demanding structural applications.