S-90044A316 1/4"-20 x 3 1/2" 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.
• Black-oxide coating on alloy steel provides enhanced corrosion resistance and a durable, non-reflective finish suitable for harsh industrial environments.
• Class 3A thread fit offers superior precision and tighter tolerances for secure, vibration-resistant assemblies in critical machinery and equipment.
• Fully threaded UNC coarse design allows for deeper engagement and faster installation, improving assembly efficiency in production lines.
• Hex socket drive enables high-torque application with standard tools, minimizing stripping and ensuring consistent clamping force.
• Rockwell C37 hardness delivers excellent wear resistance, extending service life in high-cycle or abrasive conditions.
• Compliance with ASTM A574, RoHS 3, and REACH guarantees material consistency, environmental safety, and global regulatory acceptance for cross-border projects.

Professional Applications & Engineering Value

This black-oxide alloy steel socket head cap screw is engineered to address common industrial challenges such as vibration loosening, corrosion, and high mechanical stress. The UNC coarse thread with Class 3A fit ensures precise alignment and robust load distribution in heavy machinery, automotive assemblies, and construction equipment. Its fully threaded rod type and hex drive design facilitate quick, secure fastening in confined spaces, reducing installation time while maintaining 170,000 psi tensile strength. Ideal for applications requiring high-strength screws with consistent performance, this fastener meets rigorous standards like ASTM A574, making it a reliable choice for OEMs and maintenance teams in sectors where durability and compliance are critical.

Specification Summary & Compliance

This socket head cap screw features a 1/4"-20 UNC coarse thread with Class 3A thread fit for precise dimensional accuracy. It is manufactured in accordance with ASTM A574 specifications and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material integrity for industrial use.