S-90128A122 8-32 x 1/8" 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 in demanding applications.
• Superior corrosion resistance from zinc plating protects against rust and environmental degradation, extending service life in harsh industrial environments.
• Precise Class 3A thread fit guarantees tight tolerances and secure fastening, minimizing vibration loosening and improving assembly reliability.
• High hardness rating (Rockwell C37) provides excellent wear resistance and durability, maintaining thread integrity through repeated installations.
• Hex socket drive design allows for high torque application and easy installation in confined spaces, streamlining maintenance and assembly processes.
• Coarse UNC threads enable quick engagement and reduced cross-threading risk, speeding up production cycles while maintaining secure connections.
• Full threading along the entire 1/8" length offers maximum grip and adjustment flexibility, ensuring consistent clamping force across various material thicknesses.

Professional Applications & Engineering Value

These zinc-plated alloy steel socket head cap screws deliver critical performance advantages for industrial applications where vibration resistance and structural integrity are paramount. The combination of 170,000 PSI tensile strength and Rockwell C37 hardness makes them ideal for machinery, automotive components, and precision equipment requiring reliable fastening under dynamic loads. The Class 3A thread fit with UNC coarse threads ensures rapid assembly while maintaining vibration resistance, significantly reducing maintenance downtime. The hex socket drive accommodates high torque requirements in space-constrained applications, while the zinc plating provides essential corrosion protection for extended service life in challenging environments. These fully threaded fasteners offer consistent clamping force distribution, making them particularly valuable for critical joints in manufacturing equipment, aerospace components, and heavy machinery where fastener failure is not an option.

Specification Summary & Compliance

This 8-32 UNC thread socket head cap screw features precise Class 3A thread fit tolerances with a 1/8" length and fully threaded design. Manufactured to ASTM A574 specifications, it ensures consistent quality and performance. The fastener is RoHS 3 (2015/863/EU) compliant and REACH (EC 1907/2006) compliant, meeting international environmental and safety standards for industrial use. The right-hand coarse threads and standard socket head profile provide reliable performance across various applications while maintaining dimensional accuracy throughout the product lifecycle.