S-91864A050 12-24 x 1 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 under high-stress conditions, reducing the risk of fastener failure.
• Superior corrosion resistance from the black-oxide finish protects against rust and extends service life in harsh industrial environments.
• Precise Class 3A thread fit provides tight, secure fastening with minimal backlash, ideal for vibration-prone applications.
• High hardness rating (Rockwell C37) offers excellent wear resistance, maintaining thread integrity through repeated use.
• Fully threaded design allows for maximum grip and adjustability along the entire length, enhancing assembly flexibility.
• Hex socket drive enables high-torque installation with standard tools, reducing stripping and improving installation efficiency.
• Compliance with ASTM A574, RoHS 3, and REACH ensures material quality and environmental safety for global supply chain integration.

Professional Applications & Engineering Value

This black-oxide alloy steel socket head cap screw is engineered to address critical challenges in heavy-duty industrial applications, such as machinery assembly, automotive components, and precision equipment. The 12-24 UNC coarse thread and Class 3A fit provide superior resistance to loosening under dynamic loads, while the fully threaded right-hand design ensures consistent clamping force across joints. The black-oxide surface treatment not only enhances corrosion resistance but also reduces galling during installation, prolonging tool life. With a high tensile strength of 170,000 psi and Rockwell C37 hardness, it withstands extreme operational stresses, making it a reliable choice for engineers seeking durability and compliance with ASTM A574 standards in demanding environments.

Specification Summary & Compliance

This socket head cap screw features precise Class 3A thread fit per UNC standards, ensuring dimensional accuracy for secure fastening. Manufactured in accordance with ASTM A574 specifications, it guarantees consistent material properties and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for environmentally regulated markets and industrial use.