S-92620A648 3/8"-24 x 1 1/2" ASME B18.2.1, SAE J429 High-Strength Grade 8 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with 150,000 psi tensile strength for reliable performance in high-stress applications
• Superior corrosion resistance through zinc yellow-chromate plating that extends service life in harsh environments
• Precision thread engagement with Class 2A UNF fine threads ensuring secure fastening and vibration resistance
• Maximum hardness durability at Rockwell C33 providing excellent wear resistance and thread integrity
• Full-threaded design offering consistent gripping power along the entire 1½" length for uniform load distribution
• Heavy-duty Grade 8 certification guaranteeing consistent quality and performance for critical applications
• External hex drive compatibility with standard tools for easy installation and removal in confined spaces

Professional Applications & Engineering Value

These Grade 8 hex head screws deliver exceptional engineering value in demanding industrial environments where fastener failure is not an option. The combination of high-strength steel construction and UNF fine threading provides superior resistance to vibrational loosening, making them ideal for heavy machinery, automotive assemblies, and structural applications. The zinc yellow-chromate plating creates a protective barrier against corrosion while maintaining dimensional stability. With their fully threaded 3/8"-24 configuration and Class 2A thread fit, these fasteners ensure precise alignment and consistent clamping force, solving common challenges of joint integrity in high-vibration settings. The external hex drive design allows for high torque application, ensuring secure fastening in critical load-bearing connections.

Specification Summary & Compliance

This 3/8"-24 UNF fine thread hex head screw features Class 2A thread fit tolerances for precise engagement and meets ASME B18.2.1 and SAE J429 specifications for dimensional accuracy and performance standards. The fastener maintains Grade 8 strength classification with verified 150,000 psi tensile strength and Rockwell C33 hardness. Manufacturing complies with industry standards for heavy-duty applications, ensuring consistent quality and reliability in industrial fastener systems.