S-91583A602 1/2"-13 x 2 1/4" 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 Rockwell C19 hardness for heavy-duty structural applications
• Optimized thread engagement through 1/2"-13 UNC coarse threading and Class 2A fit, providing secure fastening with reduced cross-threading risk
• Enhanced installation efficiency with external hex drive and 7/8" head width, allowing high torque application with standard tools
• Reliable partial threading design with 1" thread length and 1 1/4" grip length, ensuring proper clamp load distribution in structural connections
• Full regulatory compliance meeting ASME B18.2.6, ASTM A325, and ASTM F3125 standards for guaranteed performance in critical applications
• Environmental responsibility with RoHS 3 and REACH compliance, ensuring safe use across global industrial markets

Professional Applications & Engineering Value

These Grade A325 hex head screws deliver critical engineering solutions for structural steel connections, bridge construction, and heavy machinery assembly. The hot-dipped galvanized steel construction provides superior corrosion protection in outdoor and high-moisture environments, significantly extending service life compared to standard coatings. The combination of 120,000 psi tensile strength and Rockwell C19 hardness ensures reliable performance under extreme vibration and dynamic loading conditions. The 1/2"-13 UNC coarse threading with Class 2A fit facilitates quick installation while maintaining precise tolerance control. These partially threaded fasteners are engineered specifically for applications requiring defined clamp zones, making them ideal for structural steel connections where precise load distribution is critical. The external hex drive design allows for high torque application during installation, ensuring secure connections in the most demanding industrial settings.

Specification Summary & Compliance

This 1/2"-13 hex head screw features precise Class 2A thread fit with UNC coarse threading standards. Manufacturing complies with ASME B18.2.6 dimensional specifications and ASTM A325/ASTM F3125 material and performance requirements. The fastener maintains full compliance with RoHS 3 (2015/863/EU) restrictions and REACH (EC 1907/2006) regulations, ensuring environmental responsibility and global market acceptance. Dimensions include 2 1/4" total length with 1" thread length and 1 1/4" grip length, providing optimal performance for structural applications requiring specified non-threaded bearing surfaces.