S-91583A118 1/2"-13 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 structural integrity with 120,000 psi tensile strength and Rockwell C19 hardness for high-load applications
• Superior corrosion resistance through hot-dipped galvanized steel coating, extending service life in harsh environments
• Reliable thread engagement with UNC coarse threads and Class 2A fit ensuring secure fastening in structural connections
• Optimized load distribution through partial threading design with 1" thread length and 3/4" grip length
• Industry-standard compliance meeting ASME B18.2.6, ASTM A325, and ASTM F3125 specifications for structural applications
• Easy installation and removal with external hex drive and 7/8" head width for standard wrench compatibility
• Environmental compliance assurance with RoHS 3 and REACH regulations for global industrial use

Professional Applications & Engineering Value

These Grade A325 hex head structural screws deliver critical performance in demanding industrial applications where failure is not an option. The hot-dipped galvanized steel construction provides exceptional corrosion protection for outdoor structures, bridges, and construction projects exposed to environmental elements. The 1/2"-13 UNC coarse threads with Class 2A tolerance ensure rapid installation and reliable performance in structural steel connections, while the partial threading design concentrates strength where needed most. Engineered to withstand extreme loads with 120,000 psi tensile strength, these structural fasteners prevent joint failure in critical applications, making them ideal for seismic-resistant construction, heavy machinery assembly, and industrial framework where vibration resistance and long-term reliability are paramount.

Specification Summary & Compliance

This 1/2"-13 hex head screw features precise Class 2A thread fit with UNC coarse threading and complies with ASME B18.2.6, ASTM A325, and ASTM F3125 manufacturing standards. The fastener maintains dimensional accuracy with 1-3/4" overall length, 1" thread length, and 3/4" grip length. Environmental compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring safe use in global industrial markets while meeting the rigorous demands of structural engineering applications.