S-91571A413 1/2"-13 x 7" ASME B18.2.6, ASTM A325, ASTM F3125 Medium-Strength Steel Heavy Hex Head Screws for Structural Applications

Key Features & Benefits at a Glance

• High tensile strength of 120,000 psi ensures reliable performance in demanding structural applications, reducing the risk of fastener failure.
• Rockwell C19 hardness provides excellent resistance to wear and deformation, extending service life in high-stress environments.
• Heavy-duty Grade A325 classification guarantees consistent quality and load-bearing capacity for critical construction and industrial projects.
• Partially threaded design with 6" grip length allows for secure clamping in thick materials, minimizing vibration loosening.
• UNC coarse thread and Class 2A fit enable faster installation and easier alignment, saving time on the job site.
• External hex drive and 7/8" head width offer superior torque application with standard tools, enhancing installation efficiency.
• Full compliance with RoHS 3 and REACH ensures environmental safety and regulatory acceptance for global industrial use.

Professional Applications & Engineering Value

This Grade A325 hex head structural bolt is engineered to address critical challenges in heavy-duty construction, bridge work, and industrial machinery assembly. The steel material combined with 120,000 psi tensile strength and Rockwell C19 hardness provides exceptional resistance to dynamic loads and shear forces, preventing structural failures in high-vibration environments. The partially threaded configuration with a 1/2"-13 UNC coarse thread ensures optimal stress distribution along the 6" grip length, reducing the risk of thread stripping in thick steel connections. Meeting ASME B18.2.6, ASTM A325, and ASTM F3125 specifications, this bolt delivers consistent performance where structural integrity is non-negotiable, while its external hex drive allows for high-torque installation with common industrial tools.

Specification Summary & Compliance

This heavy-duty hex head screw features a 1/2"-13 UNC coarse thread with Class 2A thread fit for standard tolerance and easy assembly. It complies with ASME B18.2.6, ASTM A325, and ASTM F3125 manufacturing specifications, ensuring dimensional accuracy and mechanical properties. The product is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting international environmental and safety standards for industrial use.