S-98164A674 1/4"-20 x 6" ASME B18.3, ASTM F879 Stainless Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance in harsh environments due to 316 stainless steel construction and passivated surface treatment
• High tensile strength of 70,000 psi ensures reliable performance under heavy mechanical loads
• Precise Class 3A thread fit provides secure, vibration-resistant connections in industrial assemblies
• Full UNC coarse threading enables faster installation and better debris clearance in demanding applications
• Hex drive design with 5/32" drive size allows for high-torque installation using standard industrial tools
• Rounded button head profile offers a clean, low-profile appearance while preventing snagging
• Comprehensive regulatory compliance including RoHS 3 and REACH ensures environmental and safety standards are met

Professional Applications & Engineering Value

This 316 stainless steel rounded head screw delivers exceptional engineering value in corrosive or high-moisture environments where ordinary fasteners fail. The combination of passivated finish and marine-grade stainless steel provides maximum protection against chemical attack and saltwater corrosion, making it ideal for marine equipment, chemical processing plants, and food processing machinery. The UNC coarse thread configuration ensures rapid assembly in production environments while maintaining superior holding power. With its hex drive design and fully threaded construction, this fastener enables quick installation and uniform stress distribution across the entire 6-inch length, preventing localized failure points in critical industrial applications requiring long-term reliability.

Specification Summary & Compliance

This fastener meets ASME B18.3 specifications with Class 3A thread fit tolerances for precision engineering applications. The 1/4"-20 UNC coarse thread provides standardized compatibility with industrial components. Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring restricted substance compliance. The passivated finish enhances corrosion resistance while maintaining the material's inherent properties, making this screw suitable for regulated industries requiring documented compliance.