S-90044A179 3/4"-10 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 from the black-oxide finish prolongs service life in harsh environments, minimizing maintenance and replacement costs.
• High hardness rating (Rockwell C37) provides excellent wear resistance, maintaining thread integrity and drive engagement over repeated use.
• Precise Class 3A thread fit offers tighter tolerances for secure, vibration-resistant assemblies, enhancing joint stability.
• 5/8" hex drive design allows for high-torque installation with standard tools, speeding up assembly and reducing labor time.
• Fully threaded coarse UNRC design enables quick installation and strong holding power in a variety of materials, improving efficiency.
• Compliance with ASTM A574, RoHS 3, and REACH ensures material consistency and environmental safety, meeting global regulatory standards for industrial use.

Professional Applications & Engineering Value

This black-oxide alloy steel socket head cap screw is engineered to address critical challenges in heavy-duty industrial settings, such as machinery assembly, automotive systems, and structural frameworks. The combination of high tensile strength (170,000 psi) and Rockwell C37 hardness ensures durability under dynamic loads and vibrations, preventing loosening and fatigue failures. The coarse UNRC threads with a Class 3A fit provide superior grip in coarse-grained materials, reducing the need for precise tapping and enabling faster installations. Additionally, the black-oxide surface treatment offers enhanced corrosion resistance, making it ideal for environments exposed to moisture or chemicals. By integrating these features, this fastener delivers reliable performance, extended service life, and reduced downtime in demanding applications like construction equipment and manufacturing tools.

Specification Summary & Compliance

This socket head cap screw features precise inch measurements with a 3/4"-10 coarse thread and Class 3A thread fit for accurate assembly. It adheres to ASTM A574 specifications for high-strength alloy steel fasteners, ensuring consistent material quality and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety for use in various industrial sectors without harmful substances.