S-90128A157 3/8"-24 x 1 1/8" ASTM A574 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 170,000 PSI for reliable performance in high-stress applications
• Superior corrosion resistance with zinc-plated alloy steel construction for extended service life
• Precise Class 3A thread fit ensuring secure fastening and vibration resistance in critical assemblies
• Fine UNF thread profile providing enhanced load distribution and improved sealing capabilities
• Standard hex socket drive (5/16") enabling easy installation in confined spaces with standard tools
• Full thread engagement along the 1-1/8" length for maximum grip strength and versatility
• Rockwell C37 hardness delivering excellent wear resistance and durability under repeated use

Professional Applications & Engineering Value

Engineered for demanding industrial environments, these socket head cap screws combine zinc-plated alloy steel construction with Class 3A fine threads to solve critical fastening challenges. The 3/8"-24 UNF thread configuration provides superior clamping force in precision equipment, automotive assemblies, and machinery where vibration resistance is paramount. The fully threaded design ensures consistent engagement across the entire length, while the standard hex drive facilitates installation in space-constrained applications. These high-strength fasteners maintain integrity under extreme loads, making them ideal for aerospace components, heavy machinery, and precision manufacturing equipment requiring reliable, long-term performance.

Specification Summary & Compliance

This socket head cap screw features Class 3A thread fit with UNF fine threads (3/8"-24) and complies with ASTM A574 manufacturing specifications. The inch-system fasteners maintain precise dimensional tolerances throughout production. Environmental compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) standards, ensuring safe use across regulated industries.