S-91571A296 3/4"-10 x 2 3/4" 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 heavy-duty structural applications, reducing the risk of fastener failure.
• High hardness rating (Rockwell C19) provides superior resistance to wear and deformation, extending service life in demanding environments.
• Partially threaded design with UNC coarse spacing allows for easier alignment and faster installation, saving time on assembly lines.
• Class 2A thread fit offers consistent, reliable engagement with nuts, minimizing loosening under vibration and load.
• External hex drive and hex head enable secure tool engagement for high-torque applications, ensuring tight fastening without stripping.
• Compliance with ASME B18.2.6, ASTM A325, and ASTM F3125 guarantees adherence to industry standards for structural integrity and safety.
• RoHS 3 and REACH environmental compliance ensures the screw meets strict regulatory requirements, supporting sustainable and safe manufacturing practices.

Professional Applications & Engineering Value

This Grade A325 hex head screw is engineered to address critical challenges in structural and industrial applications, such as steel frame construction, bridge building, and heavy machinery assembly. Its heavy-duty steel construction and 120,000 psi tensile strength provide the necessary durability to withstand high stress and dynamic loads, preventing joint failure in critical connections. The partially threaded design with UNC coarse threads facilitates quick installation and reduces the risk of cross-threading, while the external hex drive allows for efficient tightening with standard tools. By incorporating Class 2A thread fit, it ensures precise engagement, minimizing vibration-induced loosening and maintenance needs. Ideal for use in structural fasteners and construction bolts, this screw delivers reliable performance, enhanced safety, and reduced downtime in professional settings.

Specification Summary & Compliance

This screw features a 3/4"-10 UNC coarse thread with Class 2A thread fit for consistent dimensional accuracy and reliable performance. It complies with key standards including ASME B18.2.6, ASTM A325, and ASTM F3125, ensuring adherence to rigorous manufacturing and material specifications. Additionally, it meets environmental regulations such as RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), confirming its suitability for global markets and eco-conscious projects.