S-92865A641 3/8"-16 x 4" ASME B18.2.1, SAE J429 Medium-Strength Grade 5 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with 120,000 PSI tensile strength for reliable performance in demanding applications
• Superior corrosion resistance through zinc plating, extending service life in various environmental conditions
• Optimized thread engagement with UNC coarse spacing and Class 2A fit for faster assembly and reduced cross-threading risk
• Enhanced driving efficiency with external hex drive design providing secure tool engagement and high torque transmission
• Consistent mechanical properties maintained through Rockwell C25 hardness and Grade 5 certification
• Full-length threading ensures maximum grip strength and uniform stress distribution along the entire fastener length
• Regulatory compliance with industry standards including ASME B18.2.1, SAE J429, RoHS 3, and REACH for quality assurance

Professional Applications & Engineering Value

These Grade 5 hex head screws deliver critical engineering solutions for industrial assembly challenges where high tensile strength and reliable fastening are paramount. The combination of zinc plated steel construction and UNC coarse threading provides excellent corrosion resistance while facilitating rapid installation in structural applications, machinery assembly, and heavy equipment manufacturing. The external hex drive design ensures positive torque transfer, reducing the risk of tool slippage during high-tension applications. With fully threaded configuration and Class 2A thread fit, these fasteners maintain consistent clamping force across the entire 4-inch length, making them ideal for securing thick materials in construction, automotive, and industrial maintenance applications where vibration resistance and long-term reliability are essential.

Specification Summary & Compliance

This 3/8"-16 x 4" hex head screw features precision UNC coarse threads with Class 2A thread fit tolerance for consistent engagement. Manufactured to meet ASME B18.2.1 dimensional specifications and SAE J429 Grade 5 mechanical requirements, ensuring dimensional accuracy and mechanical performance. Compliant with RoHS 3 (2015/863/EU) restrictions on hazardous substances and REACH (EC 1907/2006) regulations for chemical safety, making these fasteners suitable for global industrial applications with strict environmental compliance requirements.