S-91571A414 1/2"-13 x 7 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 tensile strength of 120,000 psi ensures reliable performance in demanding structural applications, reducing the risk of fastener failure.
• High hardness rating (Rockwell C19) provides superior resistance to wear and deformation, extending service life in high-stress environments.
• Coarse UNC threading offers faster installation and better debris resistance, ideal for structural steel and heavy construction projects.
• Partially threaded design with a 6 1/2" grip length allows for precise clamping force control and secure joint integrity.
• External hex drive enables easy installation with standard tools, reducing assembly time and labor costs.
• Full compliance with ASME B18.2.6, ASTM A325, and ASTM F3125 standards guarantees consistent quality and engineering reliability.
• Environmental compliance with RoHS 3 and REACH regulations ensures safe, sustainable use in global industrial markets.

Professional Applications & Engineering Value

Engineered for heavy-duty structural applications, this Grade A325 hex head screw addresses critical challenges in construction and industrial assembly. The high-strength steel construction, combined with a Rockwell C19 hardness, resists shear and tensile stresses in structural steel connections, bridges, and machinery frames. The 1/2"-13 UNC coarse thread facilitates quick alignment and robust engagement, even in environments prone to vibration or debris. With a partially threaded shank and 6 1/2" grip length, it ensures uniform clamping force across joint interfaces, preventing loosening and maintaining structural integrity under dynamic loads. This ASME B18.2.6 compliant fastener is indispensable for projects requiring dependable, high-performance structural fastening solutions that meet rigorous engineering standards.

Specification Summary & Compliance

This screw features Class 2A thread fit for consistent assembly and reliable engagement. It conforms to ASME B18.2.6, ASTM A325, and ASTM F3125 manufacturing specifications, ensuring dimensional accuracy and mechanical properties. Environmental compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting sustainable procurement practices.