S-92949A869 3/8"-16 x 1 5/8" ASME B18.3, ASTM F879 Stainless Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction and passivated finish for extended service life in harsh environments
• Exceptional load-bearing capability with 70,000 psi tensile strength and Rockwell B55 hardness for demanding applications
• Precision thread engagement with Class 3A fit and UNC coarse threading for reliable fastening and vibration resistance
• Optimized torque transmission through hex drive design and fully threaded body for secure installation
• Streamlined head profile with rounded button style providing a finished appearance while minimizing snag hazards
• Regulatory compliance assurance meeting ASME B18.3, RoHS 3, and REACH standards for quality and environmental safety
• Versatile industrial application with 1 5/8" length and coarse thread spacing suitable for various material thicknesses

Professional Applications & Engineering Value

This 18-8 stainless steel rounded head screw delivers critical performance advantages for industrial assembly and machinery applications. The combination of Class 3A thread fit and UNC coarse threading ensures rapid installation and superior vibration resistance in high-stress environments. The passivated finish enhances the natural corrosion resistance of stainless steel, making it ideal for chemical processing, marine equipment, and food processing machinery where moisture resistance is essential. The hex drive configuration provides excellent torque transmission during installation, reducing the risk of stripped heads while the fully threaded design maintains consistent clamping force across the entire fastener length. These engineering features collectively address common industrial challenges including corrosion-induced failure, vibration loosening, and installation efficiency.

Specification Summary & Compliance

This 3/8"-16 UNC screw features precision Class 3A thread fit with coarse thread spacing, manufactured to ASME B18.3 specifications. The fastener maintains dimensional accuracy with a head diameter of 0.656" and overall length of 1 5/8". Compliance is verified with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring adherence to international standards for hazardous substance restrictions and chemical safety in industrial components.