S-91251A761 9/16"-12 x 2 1/4" 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.
• Class 3A thread fit provides superior precision and tight tolerances for secure, vibration-resistant assemblies in industrial settings.
• Black-oxide coating on alloy steel enhances corrosion resistance, extending service life in harsh environments without compromising structural integrity.
• Rockwell C37 hardness offers excellent durability and wear resistance, minimizing deformation under heavy loads.
• Coarse UNC threads facilitate quick and easy installation, reducing assembly time while maintaining strong holding power.
• Hex socket drive design allows for high-torque application with standard tools, ensuring efficient fastening in confined spaces.
• Full compliance with ASTM A574, RoHS 3, and REACH guarantees adherence to industry standards and environmental safety, supporting sustainable procurement.

Professional Applications & Engineering Value

This Black-Oxide Alloy Steel Socket Head Cap Screw is engineered to address critical challenges in heavy-duty industrial assemblies, such as machinery, automotive systems, and structural frameworks. The 9/16"-12 UNC coarse thread and Class 3A fit ensure precise engagement and resistance to loosening under dynamic loads, while the 170,000 PSI tensile strength and Rockwell C37 hardness provide robust performance in high-vibration environments. The corrosion-resistant black-oxide surface treatment protects against oxidation and wear, making it ideal for applications exposed to moisture or chemicals. By integrating these features, this fastener enhances assembly reliability, reduces maintenance needs, and supports long-term operational efficiency in demanding sectors like manufacturing and construction.

Specification Summary & Compliance

This socket head cap screw features a 9/16"-12 UNC coarse thread with Class 3A thread fit for high precision, and it is fully threaded for consistent engagement. Manufactured in accordance with ASTM A574 specifications, it ensures dimensional accuracy and mechanical properties. The product is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting environmental and safety standards in industrial supply chains.