S-90128A727 1/2"-13 x 3 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 from zinc plating protects against rust and environmental degradation, extending service life in harsh industrial settings.
• Precise Class 3A thread fit guarantees tight, secure connections with minimal backlash, enhancing assembly accuracy and vibration resistance.
• High hardness rating (Rockwell C37) provides excellent wear resistance, maintaining thread integrity and drive feature through repeated use.
• Hex socket drive design allows for high-torque installation with standard 3/8" tools, facilitating efficient assembly in confined spaces.
• Coarse UNC threading enables quick installation and superior grip in a wide range of materials, improving assembly speed and reliability.
• Regulatory compliance with ASTM A574, RoHS 3, and REACH standards ensures material quality and environmental safety for global industrial applications.

Professional Applications & Engineering Value

Engineered for heavy-duty industrial applications, these zinc-plated alloy steel socket head cap screws solve critical challenges in machinery assembly, structural frameworks, and equipment manufacturing. The combination of 1/2"-13 UNC coarse threads with Class 3A fit provides exceptional clamping force and vibration resistance, preventing loosening in dynamic environments. The partially threaded design offers optimal stress distribution, while the hex drive socket enables high-torque installation without stripping. Ideal for automotive, construction, and manufacturing sectors where 170,000 psi tensile strength and corrosion protection are paramount for long-term reliability and reduced maintenance costs.

Specification Summary & Compliance

This socket head cap screw features precise 1/2"-13 UNC coarse threads with Class 3A fit for superior thread engagement and dimensional accuracy. Manufacturing complies with ASTM A574 specification for high-strength alloy steel fasteners. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material restrictions adherence for industrial use.