S-90044A125 1/4"-20 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 high-stress conditions, reducing the risk of fastener failure in demanding applications.
• Superior corrosion resistance provided by the black-oxide finish on alloy steel, extending service life in harsh industrial environments.
• Precise Class 3A thread fit offers excellent engagement and vibration resistance, maintaining joint integrity in machinery and equipment.
• Hex socket drive design allows for high torque application and easy installation in confined spaces, improving assembly efficiency.
• Fully threaded shank ensures consistent clamping force along the entire length, ideal for adjustable or deep-set applications.
• Compliance with ASTM A574 guarantees material quality and manufacturing consistency, providing peace of mind for critical engineering projects.
• RoHS 3 and REACH compliance ensures environmental and safety standards are met, suitable for global supply chain requirements.

Professional Applications & Engineering Value

This black-oxide alloy steel socket head cap screw is engineered to address common industrial challenges such as vibration loosening, corrosion, and high-load demands. The Class 3A UNRC coarse threads provide superior holding power in metals and plastics, while the hex drive enables secure tightening in hard-to-reach areas. Its 170,000 psi tensile strength and Rockwell C37 hardness make it ideal for heavy machinery, automotive assemblies, and precision equipment where durability and reliability are critical. The black-oxide surface treatment not only enhances corrosion resistance but also reduces galling, ensuring smooth installation and long-term performance in demanding environments.

Specification Summary & Compliance

This socket head cap screw features a 1/4"-20 thread size with Class 3A fit and coarse thread spacing, ensuring precise dimensional accuracy per UNRC standards. It is manufactured in compliance with ASTM A574 for material and mechanical properties, and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, confirming its suitability for restricted substance-controlled applications.