S-91274A324 3/8"-16 x 2" ASME B18.3, ASTM A574, ASTM B117 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 170,000 psi ensures reliable performance in high-stress applications, reducing the risk of fastener failure.
• Superior corrosion resistance provided by the zinc-flake coating, extending service life in harsh industrial environments.
• Precise Class 3A thread fit guarantees secure, vibration-resistant connections, minimizing loosening in dynamic assemblies.
• High hardness rating (Rockwell C37) enhances wear resistance, maintaining thread integrity through repeated use.
• 5/16" hex drive design allows for easy installation and high torque application with standard tools, improving assembly efficiency.
• Partially threaded shank provides optimal grip and clamping force control in precision-machined components.
• Compliance with ASME B18.3 and ASTM A574 standards ensures consistent quality and interchangeability in regulated industries.

Professional Applications & Engineering Value

Engineered for demanding industrial environments, this 3/8"-16 UNC Socket Head Cap Screw delivers critical performance where reliability is non-negotiable. The zinc-flake-coated alloy steel construction provides exceptional corrosion resistance, solving common failure points in machinery exposed to moisture, chemicals, or outdoor conditions. With its coarse UNC thread and Class 3A thread fit, it ensures rapid assembly and maintains clamping force under vibration—making it ideal for heavy equipment, automotive systems, and precision manufacturing fixtures. The partially threaded design allows precise positioning in tapped holes, while the socket head accommodates high-torque applications in confined spaces where wrench clearance is limited.

Specification Summary & Compliance

This fastener maintains Class 3A thread tolerance per UNC standards, ensuring precise fit in mating components. Manufacturing adheres to ASME B18.3 dimensional specifications and ASTM A574 material requirements. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for global industrial supply chains without hazardous substance restrictions.