S-90604A541 1/4"-20 x 3/4" ASME B18.6.3 Stainless Steel Pan Head Combination Phillips/Slotted 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 mechanical strength with 100,000 psi tensile strength and Rockwell B100 hardness for heavy-duty applications
• Versatile drive compatibility featuring both Phillips and slotted drive options for flexible installation with standard tools
• Reliable thread engagement with Class 2A UNC coarse threads ensuring secure fastening and vibration resistance
• Full threading design provides maximum grip length and uniform stress distribution across the entire fastener
• Industry-standard compliance meeting ASME B18.6.3 specifications for dimensional accuracy and performance reliability
• Environmental responsibility with RoHS 3 and REACH compliance for safe use in regulated industries

Professional Applications & Engineering Value

Engineered for demanding industrial environments, these 18-8 stainless steel pan head screws deliver exceptional performance where corrosion resistance and mechanical strength are critical. The passivated surface treatment significantly enhances the natural corrosion resistance of stainless steel, making these UNC threaded fasteners ideal for outdoor equipment, marine applications, and chemical processing facilities. The combination of Phillips/slotted drive compatibility and Class 2A thread fit ensures quick installation and reliable performance in assembly lines, machinery maintenance, and structural applications. The rounded pan head profile provides a finished appearance while distributing clamp load effectively, preventing surface damage in sensitive applications. These industrial-grade screws maintain integrity under high stress conditions, offering engineers a dependable solution for permanent installations requiring long-term reliability.

Specification Summary & Compliance

This 1/4"-20 x 3/4" pan head screw features precise UNC coarse threads with Class 2A tolerance for consistent fit and performance. Manufactured to ASME B18.6.3 standards for dimensional accuracy and mechanical properties. The fastener is fully compliant with RoHS 3 (2015/863/EU) regulations and REACH (EC 1907/2006) requirements, ensuring environmental safety and regulatory acceptance across global markets. The right-hand thread direction and fully threaded design provide uniform engagement characteristics throughout the fastener length.