S-90044A249 3-56 x 1/2" ASTM A574 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide coating, extending service life in demanding industrial environments.
• Exceptional tensile strength of 170,000 psi ensures reliable performance under high-stress applications.
• Precise Class 3A thread fit provides secure, vibration-resistant fastening for critical assemblies.
• High hardness rating (Rockwell C37) minimizes wear and deformation during installation and use.
• Compact hex drive design (5/64") allows for easy installation in confined spaces with standard tools.
• Full threading offers consistent clamping force along the entire 1/2" length for uniform load distribution.
• Compliance with ASTM A574 guarantees consistent quality and mechanical properties for engineering applications.

Professional Applications & Engineering Value

This black-oxide alloy steel socket head cap screw with 3-56 UNF fine thread is engineered to address common industrial challenges such as vibration loosening and material fatigue. The Class 3A thread fit ensures tight tolerances, reducing the risk of assembly failure in precision machinery, automotive components, and electronic enclosures. Its high tensile strength and Rockwell C37 hardness provide durability against dynamic loads and repeated stress, making it ideal for applications requiring reliable, long-term fastening solutions. The hex drive socket head design facilitates quick installation and removal, enhancing maintenance efficiency in tight spaces.

Specification Summary & Compliance

This screw features a 3-56 UNF fine thread with Class 3A fit and right-hand thread direction, manufactured to ASTM A574 specifications. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental and safety standards are met for global industrial use.