S-91251A841 3/4"-10 x 1 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 extreme loads, reducing the risk of fastener failure in demanding applications.
• Superior thread fit with Class 3A tolerance provides precise engagement and vibration resistance, enhancing assembly integrity and reducing maintenance needs.
• Black-oxide finish on alloy steel offers corrosion resistance and a durable surface, extending service life in harsh industrial environments.
• High hardness (Rockwell C37) maintains thread form and drive integrity during installation and use, preventing stripping and wear.
• Coarse UNRC threads allow for quicker installation and better performance in materials prone to debris or galling, saving time and labor costs.
• Fully threaded design ensures consistent clamping force along the entire length, ideal for adjustable or high-stress connections.
• Compliance with ASTM A574, RoHS 3, and REACH guarantees material quality and environmental safety, meeting global industry standards for procurement.

Professional Applications & Engineering Value

This Socket Head Cap Screw is engineered from black-oxide alloy steel to address common industrial challenges like corrosion, high-stress fatigue, and assembly precision. The Class 3A thread fit and coarse UNRC threads ensure secure fastening in heavy machinery, automotive systems, and structural frameworks, minimizing loosening from vibrations. With a Rockwell C37 hardness and 170,000 psi tensile strength, it withstands dynamic loads and harsh conditions, reducing downtime and replacement costs. The 5/8" hex drive and standard socket head profile facilitate easy installation in confined spaces, making it a reliable choice for OEMs and maintenance teams seeking durability and compliance with ASTM A574 standards.

Specification Summary & Compliance

This screw features a 3/4"-10 coarse thread with Class 3A fit for high precision, a length of 1-3/4", and a fully threaded rod type. It conforms to ASTM A574 specifications for alloy steel socket head cap screws and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material reliability in industrial applications.