S-92198A643 3/8"-16 x 4 3/4" ASME B18.2.1 18-8 Stainless Steel Hex Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments
• Exceptional tensile strength of 80,000 psi ensures reliable performance under heavy loads
• Precise Class 2A thread fit guarantees smooth assembly and secure fastening in demanding applications
• External hex drive design provides excellent torque transmission and easy installation with standard tools
• Partially threaded configuration offers optimal clamping force distribution and vibration resistance
• Full regulatory compliance with RoHS 3 and REACH standards for environmentally responsible manufacturing
• Rockwell B70 hardness rating delivers excellent durability and resistance to wear and deformation

Professional Applications & Engineering Value

This 3/8"-16 UNC hex head screw delivers exceptional engineering value in demanding industrial applications where corrosion resistance and mechanical strength are critical. The 18-8 stainless steel construction provides superior protection against rust and chemical exposure, making it ideal for marine, chemical processing, and outdoor equipment applications. The partially threaded design ensures optimal stress distribution while the coarse thread spacing facilitates quick assembly in challenging materials. With its external hex drive configuration, installers benefit from maximum torque application without slippage, reducing installation time and preventing fastener damage. The combination of 80,000 psi tensile strength and Rockwell B70 hardness makes this fastener suitable for structural applications, machinery assembly, and heavy equipment where vibration resistance and long-term reliability are paramount.

Specification Summary & Compliance

This hex head screw features precision UNC coarse threads with Class 2A thread fit tolerance for consistent performance. Manufactured to ASME B18.2.1 specifications, the fastener delivers reliable dimensional accuracy and mechanical properties. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across various industrial sectors. The inch system measurements, including the 4-3/4" length and 9/16" head width, maintain strict adherence to standardized dimensions for compatibility with existing equipment and tooling.