S-91571A312 3/4"-10 x 6" 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 load-bearing capacity with 120,000 psi tensile strength for reliable performance in demanding structural applications
• Superior corrosion resistance and durability thanks to high-grade steel construction and Rockwell C19 hardness rating
• Secure fastening with precise thread engagement through Class 2A thread fit and UNC coarse threading that resists loosening
• Easy installation and removal with standard 1 1/4" external hex head design compatible with common tools
• Optimized weight distribution with partial threading and 4 5/8" grip length for enhanced structural stability
• Full regulatory compliance meeting ASME B18.2.6, ASTM A325, and ASTM F3125 standards for quality assurance
• Environmentally responsible manufacturing with RoHS 3 and REACH compliance for sustainable procurement

Professional Applications & Engineering Value

This 3/4"-10 Grade A325 hex head screw delivers critical engineering solutions for heavy-duty industrial applications where structural integrity is paramount. The high-strength steel construction combined with Rockwell C19 hardness ensures exceptional resistance to shear forces and environmental degradation in construction, bridgework, and structural steel assemblies. The UNC coarse thread pattern provides superior grip in various materials while the partially threaded design concentrates strength where needed most. With external hex drive compatibility, installation efficiency is maximized without compromising the 120,000 psi tensile strength that prevents joint failure under extreme loads. These industrial fasteners are engineered to maintain clamping force in dynamic loading conditions, making them ideal for critical connections in machinery, structural frameworks, and heavy equipment where reliability cannot be compromised.

Specification Summary & Compliance

This heavy-duty hex head screw features precise Class 2A thread fit tolerances with 3/4"-10 UNC coarse threading and right-hand thread direction. Manufacturing complies with ASME B18.2.6 dimensional specifications and meets material requirements of ASTM A325 and ASTM F3125 standards. The fastener is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring environmental responsibility while delivering the mechanical properties required for the most demanding structural applications.