S-91251A004 7/16"-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 heavy loads, reducing the risk of fastener failure in demanding applications.
• Class 3A thread fit provides superior precision and tighter tolerances, offering improved assembly consistency and vibration resistance.
• Black-oxide alloy steel construction enhances corrosion resistance and durability, extending service life in harsh industrial environments.
• Partially threaded design allows for secure clamping in specific zones, minimizing material stress and improving joint integrity.
• Hex socket drive (3/8") enables easy installation with standard tools, reducing assembly time and preventing stripping.
• Fine UNF thread spacing delivers better holding power and finer adjustment control, ideal for precision engineering applications.
• Compliance with ASTM A574, RoHS 3, and REACH ensures adherence to industry standards and environmental regulations, supporting global supply chain requirements.

Professional Applications & Engineering Value

This 7/16-20 UNF socket head cap screw is engineered to address critical challenges in industrial applications where high strength and reliability are paramount. The black-oxide alloy steel material, combined with a Rockwell C37 hardness, resists wear and corrosion, making it suitable for machinery, automotive assemblies, and heavy equipment. The fine thread spacing and Class 3A thread fit provide superior grip and vibration resistance, reducing loosening in dynamic environments. Its partially threaded configuration allows for precise clamping without over-tightening, minimizing stress concentrations. Ideal for high-stress fastening in construction and manufacturing, this screw ensures long-term performance and safety, backed by rigorous standards compliance.

Specification Summary & Compliance

This product features precise Class 3A thread fit and UNF fine thread specifications, ensuring dimensional accuracy and compatibility. It meets ASTM A574 manufacturing standards for socket head cap screws and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting environmentally responsible sourcing and usage in industrial settings.