S-90128A806 5/8"-11 x 3" ASTM A574 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 170,000 psi ensures reliable performance in high-stress industrial applications, reducing the risk of fastener failure.
• Superior corrosion resistance with zinc-plated alloy steel construction, extending service life in harsh environments.
• Precise Class 3A thread fit provides tighter tolerances for secure, vibration-resistant assemblies in critical machinery.
• 1/2" hex drive design allows for high-torque installation with standard tools, improving assembly efficiency and reducing slippage.
• Partially threaded shank offers optimal grip and alignment in fastened joints, minimizing stress concentration.
• Compliance with ASTM A574 guarantees consistent quality and mechanical properties for dependable engineering use.
• RoHS 3 and REACH compliance ensures environmental safety and regulatory adherence in global supply chains.

Professional Applications & Engineering Value

This 5/8"-11 UNC Socket Head Cap Screw is engineered to address common industrial challenges such as vibration loosening and material fatigue. The zinc-plated alloy steel provides a durable barrier against corrosion, making it ideal for outdoor equipment, automotive assemblies, and heavy machinery. With a coarse thread and Class 3A fit, it ensures quick installation and secure fastening in high-vibration environments, reducing maintenance downtime. The partially threaded design concentrates clamping force effectively, preventing joint failure in structural applications. Its high tensile strength and Rockwell C37 hardness support demanding loads, offering long-term reliability for B2B clients in manufacturing and construction sectors.

Specification Summary & Compliance

This fastener adheres to UNC coarse thread standards with a Class 3A thread fit for precision and durability. It meets ASTM A574 specifications for socket head cap screws, ensuring consistent mechanical properties. The product is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting environmentally responsible procurement. Dimensions include a 3" length, 15/16" head diameter, and 1/2" hex drive, designed for reliable performance in industrial applications.