S-90128A155 3/8"-24 x 5/8" ASTM A574 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Superior tensile strength of 170,000 PSI ensures reliable performance under extreme mechanical loads, reducing the risk of fastener failure in demanding applications.
• Exceptional hardness rating of Rockwell C37 provides excellent wear resistance and maintains thread integrity through repeated assembly and disassembly cycles.
• Zinc-plated alloy steel construction offers enhanced corrosion protection, extending service life in various industrial environments while maintaining cost-effectiveness.
• Precision Class 3A thread fit delivers tighter tolerances for superior vibration resistance and more secure fastening in critical assemblies.
• Fine UNF thread configuration (3/8"-24) allows for finer adjustment control and improved load distribution compared to coarse thread alternatives.
• Hex socket drive design with 5/16" drive size enables high torque application and secure installation in confined spaces where wrench clearance is limited.
• Fully threaded body provides maximum grip length flexibility and consistent clamping force distribution across the entire fastener length.

Professional Applications & Engineering Value

These socket head cap screws deliver critical engineering solutions where space constraints and high-strength requirements intersect. The zinc-plated alloy steel construction addresses corrosion concerns in industrial environments while maintaining the 170,000 PSI tensile strength necessary for heavy machinery, automotive assemblies, and precision equipment. The fine UNF threads (3/8"-24) provide superior vibration resistance compared to coarse threads, making them ideal for applications subject to dynamic loads or thermal cycling. The hex socket drive system allows for high-torque installation in confined spaces where traditional wrench access is limited, while the Class 3A thread fit ensures precise engagement and reliable performance in critical fastening applications requiring minimal backlash.

Specification Summary & Compliance

This socket head cap screw features precision 3/8"-24 UNF fine threads with Class 3A fit for superior dimensional accuracy and engagement. Manufactured to ASTM A574 specifications for high-strength alloy steel socket head cap screws, ensuring consistent quality and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, making it suitable for global industrial applications with strict material restrictions.