S-91251A075 3/4"-10 x 4 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 corrosion resistance from the black-oxide finish on alloy steel, extending service life in harsh industrial environments and minimizing maintenance needs.
• High-precision Class 3A thread fit provides secure, vibration-resistant connections, maintaining joint integrity in machinery and equipment.
• Robust Rockwell C37 hardness offers excellent wear resistance, preserving thread integrity and drive features during repeated use.
• Convenient hex drive design with a 5/8" drive size allows for easy installation and removal using standard tools, saving time on assembly lines.
• Partially threaded shank enables precise clamping force distribution, ideal for applications requiring controlled tension and alignment.
• Compliance with ASTM A574, RoHS 3, and REACH ensures material consistency, environmental safety, and suitability for regulated industries.

Professional Applications & Engineering Value

Engineered for heavy-duty industrial use, this 3/4"-10 socket head cap screw addresses critical challenges in machinery assembly, construction, and automotive sectors. The black-oxide alloy steel construction combats rust and wear in corrosive settings, while the coarse UNRC threads and Class 3A fit deliver superior grip in high-vibration environments, preventing loosening. With a 170,000 psi tensile strength and Rockwell C37 hardness, it withstands intense mechanical stress, making it ideal for securing structural components, engine parts, and precision equipment where durability and reliability are paramount. The hex drive design simplifies maintenance, reducing downtime in production cycles.

Specification Summary & Compliance

This screw features a 3/4"-10 coarse thread with Class 3A precision fit and a minimum thread length of 2", ensuring tight tolerances per UNRC standards. It complies with ASTM A574 for material specifications, RoHS 3 (2015/863/EU) for restricted substances, and REACH (EC 1907/2006) for chemical safety, affirming its suitability for global industrial applications.