S-91583A605 1/2"-13 x 3 1/2" 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 durability in harsh industrial environments
• High-strength structural performance with 120,000 psi tensile strength and Rockwell C19 hardness for reliable load-bearing applications
• Secure fastening and easy installation through UNC coarse threading and external hex drive design, reducing assembly time
• Optimized grip and load distribution with 2 1/2" grip length and partial threading for enhanced structural stability
• Compliance with major industry standards including ASME B18.2.6, ASTM A325, and ASTM F3125 for guaranteed quality and reliability
• Environmental regulation compliance with RoHS 3 and REACH, making them suitable for global industrial applications
• Precision manufacturing with Class 2A thread fit ensuring consistent performance and easy installation

Professional Applications & Engineering Value

These Grade A325 hot-dipped galvanized steel hex head screws deliver critical engineering value in demanding structural applications. The hot-dipped galvanized coating provides superior corrosion protection, solving the common industrial problem of fastener degradation in exposed environments. The combination of 120,000 psi tensile strength and Rockwell C19 hardness ensures these structural bolts maintain integrity under extreme loads, making them ideal for construction, bridge work, and heavy machinery assembly. The UNC coarse threading and partial threading design prevent loosening under vibration while the external hex drive allows for high-torque installation with standard tools. These heavy-duty hex bolts are engineered to withstand the rigors of industrial use while maintaining consistent performance throughout their service life.

Specification Summary & Compliance

These 1/2"-13 hex head screws feature Class 2A thread fit tolerance for precise installation and UNC coarse threading for optimal performance in structural applications. Manufacturing complies with ASME B18.2.6, ASTM A325, and ASTM F3125 specifications. The fasteners are fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting international environmental and safety standards for industrial use.