S-91251A250 10-24 x 1 3/8" 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 industrial applications, reducing the risk of fastener failure.
• Black-oxide coating on alloy steel provides enhanced corrosion resistance, extending service life in harsh environments.
• Class 3A thread fit guarantees precise, tight tolerances for secure fastening and vibration resistance in critical assemblies.
• Rockwell C37 hardness offers superior durability and wear resistance, minimizing deformation under heavy loads.
• Partially threaded design with coarse UNRC threads allows for easy alignment and quick installation, improving assembly efficiency.
• 5/32" hex drive and standard socket head enable straightforward installation with common tools, reducing labor time and errors.
• Compliance with ASTM A574, RoHS 3, and REACH ensures adherence to industry standards for safety and environmental responsibility.

Professional Applications & Engineering Value

This black-oxide alloy steel socket head cap screw is engineered to address common industrial challenges, such as corrosion and mechanical stress in demanding environments. The 10-24 coarse thread and Class 3A thread fit provide excellent grip and vibration resistance, making it ideal for machinery, automotive, and aerospace applications where precision is critical. Its partially threaded and right-hand UNRC design facilitates easy insertion and secure fastening, reducing assembly time while maintaining high tensile strength. The black-oxide surface treatment enhances durability against rust, ensuring long-term reliability in outdoor or humid conditions, thus minimizing maintenance costs and downtime.

Specification Summary & Compliance

This fastener features precise Class 3A thread fit and UNRC coarse threads with a thread size of 10-24, ensuring dimensional accuracy per industry standards. It complies with ASTM A574 for material specifications, RoHS 3 (2015/863/EU) for restricted hazardous substances, and REACH (EC 1907/2006) for chemical safety, providing assurance of quality and regulatory adherence in professional use.