S-90044A221 2"-8 x 6" ASTM A574 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 170,000 psi ensures reliable performance in high-stress applications, reducing the risk of fastener failure.
• Superior corrosion resistance from the black-oxide finish prolongs service life in harsh industrial environments, minimizing maintenance needs.
• Precision Class 2A thread fit guarantees easy assembly and secure fastening, enhancing operational efficiency.
• High hardness rating (Rockwell C37) provides excellent wear resistance, maintaining integrity under repetitive loads.
• Partially threaded design allows for focused clamping force and vibration resistance in specific joint areas.
• Compliance with ASTM A574 ensures consistent quality and reliability, meeting rigorous industry standards.
• RoHS 3 and REACH compliance supports environmental and safety regulations, facilitating global supply chain integration.

Professional Applications & Engineering Value

This 2"-8 UNF socket head cap screw is engineered from black-oxide alloy steel to address critical challenges in heavy-duty industrial settings. Its fine thread and Class 2A fit deliver precise alignment and vibration resistance, ideal for machinery, automotive assemblies, and construction equipment where loosening under dynamic loads is a concern. The high tensile strength and Rockwell C37 hardness prevent stripping and deformation, ensuring long-term durability in high-torque applications. By combining robust material properties with a standard socket head profile and 1 1/2" hex drive, it simplifies installation in confined spaces, reducing downtime and enhancing productivity for engineers and maintenance teams.

Specification Summary & Compliance

This fastener adheres to Class 2A thread fit per UN standards, ensuring dimensional accuracy for consistent performance. It meets 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, confirming its suitability for environmentally conscious and regulated industries.