S-91583A622 7/8"-9 x 1 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 with hot-dipped galvanized steel coating, ensuring long-term reliability in harsh industrial environments
• Superior load-bearing capacity with 120,000 PSI tensile strength and Grade A325 certification for heavy-duty structural applications
• Optimized installation efficiency featuring a coarse 7/8"-9 UNC thread and Class 2A fit for faster assembly and secure fastening
• Maximum thread engagement through fully threaded design, providing consistent clamping force across the entire length
• Enhanced torque transmission with external hex drive and 1 7/16" head width for reliable tool engagement during high-torque applications
• Proven mechanical durability with Rockwell C19 hardness, maintaining structural integrity under repetitive dynamic loads
• Broad regulatory compliance meeting ASME, ASTM, RoHS 3 and REACH standards for global industrial deployment

Professional Applications & Engineering Value

Engineered for critical structural connections, these Grade A325 hex head screws deliver exceptional performance in construction, bridge building, and heavy machinery assembly. The hot-dipped galvanized steel construction provides superior corrosion protection in outdoor and high-moisture environments, while the coarse UNC thread design prevents cross-threading and enables rapid installation in structural steel applications. With fully threaded configuration and 120,000 PSI tensile strength, these industrial-grade bolts maintain consistent preload and resist vibration-induced loosening, addressing common failure points in dynamic load-bearing structures. The external hex drive ensures compatibility with standard industrial tools, streamlining maintenance and assembly processes.

Specification Summary & Compliance

Manufactured to precise Class 2A thread fit tolerances with 7/8"-9 UNC coarse thread specification. Complies with ASME B18.2.6, ASTM A325, and ASTM F3125 manufacturing standards. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental compliance requirements. Features 1 3/4" length with fully threaded configuration and right-hand thread direction for standardized industrial applications.