S-90128A147 3/8"-16 x 1 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.
• Zinc-plated alloy steel construction provides superior corrosion resistance, extending service life in harsh industrial environments.
• Class 3A thread fit offers precise, tight-tolerance engagement for secure fastening and vibration resistance in machinery and equipment.
• Fully threaded design allows for maximum grip and adjustability along the entire length, ideal for components requiring uniform clamping force.
• Hex socket drive (5/16") enables high-torque installation with standard tools, minimizing stripping and improving assembly efficiency.
• Rockwell C37 hardness ensures excellent wear resistance and durability, maintaining thread integrity through repeated use.
• Compliance with ASTM A574, RoHS 3, and REACH guarantees material quality and environmental safety for global industrial supply chains.

Professional Applications & Engineering Value

This 3/8"-16 UNC Socket Head Cap Screw is engineered to address critical challenges in heavy-duty assembly, where vibration loosening and material fatigue are common concerns. The zinc-plated alloy steel combats corrosion in outdoor or chemically exposed settings, while the coarse UNC thread facilitates quick installation and robust holding power in metals and composites. Its fully threaded, right-hand design ensures consistent load distribution, making it ideal for machinery frames, automotive components, and industrial equipment requiring high-strength fastening. By meeting ASTM A574 specifications, it delivers predictable performance for engineers prioritizing reliability and compliance in their designs.

Specification Summary & Compliance

This socket head cap screw features a 3/8"-16 UNC coarse thread with Class 3A fit, ensuring precise dimensional accuracy per industry standards. It is manufactured from zinc-plated alloy steel with a tensile strength of 170,000 psi and Rockwell C37 hardness. The product conforms to ASTM A574 for material and mechanical properties, and is verified as RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, supporting use in regulated environments without hazardous substances.