S-91251A367 7/16"-20 x 1 1/8" ASTM A574 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 170,000 psi provides reliable performance in high-stress applications, reducing the risk of fastener failure.
• Class 3A thread fit ensures superior precision and tight tolerances for secure, vibration-resistant assemblies in critical machinery.
• Black-oxide coating on alloy steel offers enhanced corrosion resistance, extending service life in harsh industrial environments.
• Fully threaded design allows for maximum grip and uniform clamping force along the entire length of the screw.
• Fine thread spacing (UNF) delivers improved adjustment accuracy and better load distribution compared to coarse threads.
• Hex socket drive (3/8") enables high-torque installation with standard tools, minimizing stripping and improving assembly efficiency.
• Compliance with RoHS 3 and REACH ensures environmental safety and regulatory adherence for global industrial supply chains.

Professional Applications & Engineering Value

This 7/16"-20 UNF socket head cap screw is engineered to address common challenges in heavy-duty applications, such as machinery assembly, automotive systems, and precision equipment. The black-oxide alloy steel construction, combined with a Rockwell C37 hardness rating, provides excellent resistance to wear and environmental degradation, reducing maintenance needs. The fine thread spacing and Class 3A fit ensure minimal backlash and secure fastening in high-vibration settings, preventing loosening over time. Its fully threaded body allows for versatile use in tapped holes or with nuts, offering consistent clamping force. Ideal for industrial fasteners requiring high strength and durability, this screw meets the demands of engineers who prioritize reliability and long-term performance in their designs.

Specification Summary & Compliance

This socket head cap screw features a 7/16"-20 UNF thread with a Class 3A fit for precise thread engagement and dimensional accuracy. It complies with ASTM A574 specifications for high-strength alloy steel fasteners, ensuring consistent manufacturing quality. The product is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, confirming adherence to environmental and safety regulations for industrial components.