S-90128A723 1/2"-13 x 2 3/4" ASTM A574 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 170,000 psi ensures reliable performance under high-stress conditions, reducing the risk of fastener failure in demanding applications.
• Superior corrosion resistance with zinc-plated alloy steel construction extends service life and maintains integrity in harsh industrial environments.
• Precise Class 3A thread fit provides tighter tolerances for secure, vibration-resistant assemblies, minimizing loosening over time.
• Coarse UNC thread design allows for faster installation and easier alignment, saving time and labor in production settings.
• Partially threaded shank with a minimum 2" thread length offers optimal grip and clamping force where needed, enhancing joint stability.
• Hex socket drive with 3/8" drive size enables high-torque application using standard tools, ensuring efficient and secure fastening.
• Compliance with ASTM A574, RoHS 3, and REACH guarantees adherence to rigorous quality and environmental standards, supporting sustainable and safe usage.

Professional Applications & Engineering Value

Engineered for heavy-duty industrial use, this zinc-plated alloy steel socket head cap screw addresses common challenges like vibration-induced loosening and corrosion in machinery, automotive, and construction assemblies. The 1/2"-13 UNC coarse thread and Class 3A thread fit ensure rapid, secure fastening even in high-vibration environments, reducing maintenance needs. With a Rockwell C37 hardness and 170,000 psi tensile strength, it withstands extreme loads without deformation, making it ideal for critical connections in equipment frames, hydraulic systems, and structural components. The partially threaded design concentrates clamping force effectively, preventing joint slippage and enhancing overall assembly durability for long-term reliability.

Specification Summary & Compliance

This socket head cap screw features precise Class 3A thread fit and UNC coarse threads with a thread size of 1/2"-13, ensuring dimensional accuracy per inch system standards. It meets ASTM A574 specifications for high-strength fasteners and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming adherence to environmental and safety requirements for industrial use.