S-91571A282 5/8"-11 x 5" 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 reliability with Grade A325 certification and 120,000 psi tensile strength for critical load-bearing applications
• Superior vibration resistance through partially threaded design and 3 3/4" grip length ensuring consistent clamping force under dynamic loads
• Optimized installation efficiency with external hex drive and 1 1/16" head width for high-torque applications using standard tools
• Enhanced thread engagement with UNC coarse threading and Class 2A fit providing reliable fastening in structural steel connections
• Long-term corrosion resistance through ASTM A325 steel construction with Rockwell C19 hardness for industrial environments
• Regulatory compliance assurance meeting ASME B18.2.6, ASTM A325/F3125 standards plus RoHS 3 and REACH environmental requirements
• Reduced assembly complexity with right-hand thread direction and 5" length accommodating various material thicknesses

Professional Applications & Engineering Value

This Grade A325 hex head screw delivers critical performance where structural integrity cannot be compromised. The ASTM A325 steel construction, combined with Rockwell C19 hardness, provides exceptional resistance to shear forces and environmental degradation in heavy construction applications. The partially threaded design with precise 3 3/4" grip length ensures optimal stress distribution across connected members, preventing joint loosening under vibration. The 5/8"-11 UNC coarse thread configuration enables rapid installation in structural steel while maintaining Class 2A thread fit precision. These heavy-duty hex bolts are engineered specifically for structural connections in building frameworks, bridge construction, and industrial machinery where 120,000 psi tensile strength is mandatory for safety-critical applications.

Specification Summary & Compliance

Manufactured to exacting ASME B18.2.6 dimensional standards with Class 2A thread fit tolerance for consistent engagement. The ASTM A325 material specification and ASTM F3125 manufacturing standards ensure mechanical properties meet structural requirements. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations guarantees safe usage in regulated markets. Thread configuration follows UNC coarse thread standards with 5/8"-11 sizing for optimal performance in structural steel applications.