S-91251A839 3/4"-10 x 1 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 in high-stress applications, reducing the risk of fastener failure.
• Black-oxide finish on alloy steel provides enhanced corrosion resistance and a durable, non-reflective surface suitable for harsh environments.
• Class 3A thread fit offers superior precision and tight tolerances for secure, vibration-resistant assemblies in critical machinery.
• Coarse UNRC threads enable faster installation and easier alignment, saving time and labor in industrial settings.
• Hex socket drive with 5/8" size allows for high-torque application and secure tool engagement, minimizing stripping and improving installation efficiency.
• Full threading along the 1-1/2" length provides consistent clamping force and flexibility in adjustment for varied assembly depths.
• Rockwell C37 hardness ensures high durability and wear resistance, extending service life in demanding applications.

Professional Applications & Engineering Value

This Black-Oxide Alloy Steel Socket Head Cap Screw is engineered to address common industrial challenges such as vibration loosening, high-load stress, and corrosive environments. The coarse UNRC threads and Class 3A fit provide excellent grip and stability, making it ideal for heavy machinery, automotive assemblies, and construction equipment where precision and reliability are critical. The black-oxide surface treatment enhances corrosion resistance without compromising the 170,000 psi tensile strength, ensuring long-term performance in outdoor or chemically exposed settings. By utilizing ASTM A574 compliant materials, this screw delivers consistent quality and reduces maintenance needs, offering a cost-effective solution for engineers and procurement specialists seeking durable, high-performance socket head cap screws.

Specification Summary & Compliance

This product adheres to Class 3A thread fit for precise dimensional accuracy and features UNRC coarse threads with a size of 3/4"-10. 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 regulatory alignment for global industrial use.