S-91251A196 8-32 x 5/8" 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.
• Superior thread fit with Class 3A precision provides tighter tolerances for secure, vibration-resistant assemblies in critical applications.
• Black-oxide coating on alloy steel offers enhanced corrosion resistance, extending service life in harsh industrial environments.
• Fully threaded UNC coarse design allows for faster installation and stronger holding power in a wide range of materials.
• Hex socket drive (9/64") enables high-torque application with standard tools, minimizing stripping and improving assembly efficiency.
• Compliance with ASTM A574, RoHS 3, and REACH ensures material consistency and environmental safety for global supply chain integration.
• Rockwell C37 hardness maintains structural integrity under repeated loads, ideal for heavy-duty mechanical fastening.

Professional Applications & Engineering Value

Engineered for demanding industrial settings, these socket head cap screws combine black-oxide alloy steel construction with UNC coarse threading to address common challenges like vibration loosening and material fatigue. The fully threaded 8-32 design ensures maximum grip in metal assemblies, machinery, and automotive components, while the hex drive facilitates precise torque control. With 170,000 psi tensile strength and Class 3A thread fit, they provide reliable clamping force in high-stress applications, reducing maintenance downtime and enhancing operational safety. Ideal for OEMs and MRO professionals seeking durable, ASTM A574-compliant fasteners that meet rigorous performance standards.

Specification Summary & Compliance

This socket head cap screw features precise Class 3A thread fit per UNC standards, with a coarse thread spacing and right-hand direction for consistent engagement. Manufactured to ASTM A574 specifications, it guarantees dimensional accuracy and material integrity. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring adherence to environmental and safety requirements for industrial use.