S-90128A313 8-32 x 7/16" ASME B18.3, 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 excellent corrosion resistance, extending service life in harsh industrial environments.
• Class 3A thread fit offers superior precision and tighter tolerances for secure, vibration-resistant assemblies with minimal backlash.
• Hex socket drive design allows for high torque application and easy installation in confined spaces, improving assembly efficiency.
• Coarse UNC threading enables quicker installation and better debris resistance compared to fine threads, saving time in production settings.
• Full threading along the 7/16" length provides consistent grip and adjustability across the entire fastener, enhancing versatility in various joint types.
• Rockwell C37 hardness rating ensures high durability and wear resistance, maintaining thread integrity through repeated use.

Professional Applications & Engineering Value

This Socket Head Cap Screw with 8-32 UNC coarse thread and zinc-plated alloy steel construction is engineered to address critical challenges in industrial fastening. Its high tensile strength and Class 3A fit prevent loosening under vibration, making it ideal for machinery, automotive assemblies, and precision equipment where reliability is paramount. The hex drive socket head facilitates secure tool engagement in tight spaces, reducing installation errors. With fully threaded design, it ensures uniform load distribution, solving common issues of joint fatigue. These features make it a top choice for engineers seeking durable, RoHS and REACH compliant fasteners that meet rigorous ASME B18.3 standards in OEM and MRO applications.

Specification Summary & Compliance

This screw adheres to Class 3A thread fit per UNC standards, ensuring precise dimensional accuracy. It conforms to ASME B18.3 manufacturing specifications and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, guaranteeing environmental safety. The inch system measurements, including 7/16" length and 9/64" hex drive, are consistently maintained for interoperability in global industrial setups.