S-91251A843 3/4"-10 x 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 extreme loads, reducing failure risks in demanding applications.
• Superior corrosion resistance from the black-oxide finish extends service life and maintains integrity in harsh industrial environments.
• Precise Class 3A thread fit provides tight, secure fastening with minimal play, enhancing assembly accuracy and vibration resistance.
• High hardness (Rockwell C37) offers excellent wear resistance, maintaining thread integrity through repeated use and high-stress conditions.
• Coarse UNRC threads enable quicker installation and better debris resistance, speeding up assembly in rugged settings.
• Hex socket drive design allows for high-torque application with standard tools, ensuring easy installation and removal without stripping.
• Full compliance with ASTM A574, RoHS 3, and REACH guarantees material quality and environmental safety for global industrial standards.

Professional Applications & Engineering Value

This black-oxide alloy steel socket head cap screw is engineered to address critical challenges in heavy machinery, automotive, and construction sectors, where high tensile strength and corrosion resistance are paramount. The UNRC coarse threads and Class 3A fit minimize cross-threading and provide secure fastening in high-vibration environments, reducing maintenance downtime. With a Rockwell C37 hardness, it withstands abrasive conditions and repeated stress, making it ideal for industrial fasteners in equipment requiring dependable, long-term performance. The hex drive design ensures efficient torque transfer, facilitating quick assembly in confined spaces while maintaining structural integrity under loads up to 170,000 psi.

Specification Summary & Compliance

This socket head cap screw adheres to Class 3A thread fit for precise dimensional accuracy and UNRC coarse thread standards, ensuring compatibility with industrial components. Manufactured in compliance with ASTM A574 specifications, it meets rigorous material and performance criteria. The product is fully RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, confirming its suitability for environmentally regulated applications without hazardous substances.