S-91251A260 10-24 x 4 3/4" 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.
• Superior corrosion resistance from the black-oxide finish on alloy steel extends service life in harsh industrial environments.
• Precise Class 3A thread fit provides tighter tolerances for secure, vibration-resistant assemblies with minimal backlash.
• Coarse UNC threading allows for quicker installation and easier disassembly, saving time in maintenance and assembly operations.
• Partially threaded design offers optimal grip and clamping force control, ideal for components requiring precise positioning.
• Hex socket drive enables high-torque application with standard tools, preventing stripping and ensuring efficient fastening.
• Compliance with ASTM A574, RoHS 3, and REACH guarantees material consistency and environmental safety for global supply chains.

Professional Applications & Engineering Value

Engineered for demanding industrial settings, these black-oxide alloy steel socket head cap screws address critical challenges like vibration loosening and corrosion. The UNC coarse thread and Class 3A fit enhance load distribution, making them ideal for machinery, automotive assemblies, and heavy equipment where high tensile strength and durability are paramount. The partially threaded rod type allows for unthreaded shank sections to act as dowels, reducing shear stress. Combined with the black-oxide surface treatment, they resist oxidation without sacrificing the hardness (Rockwell C37), ensuring long-term reliability in humid or abrasive conditions while meeting strict industry standards.

Specification Summary & Compliance

This 10-24 UNC socket head cap screw features a Class 3A thread fit for precision alignment and a minimum thread length of 7/8". Manufactured in accordance with ASTM A574 specifications, it guarantees consistent mechanical properties. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and safe for use in various industrial and export markets.