S-90604A306 2-56 x 1/2" ASME B18.6.3 Stainless Steel Pan Head Combination Phillips/Slotted Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance thanks to 18-8 stainless steel construction and passivated finish, ensuring long-term reliability in harsh environments
• Exceptional mechanical strength with 100,000 psi tensile strength and Rockwell B100 hardness for reliable performance under high-stress conditions
• Precision thread engagement with Class 2A fit and UNC coarse threads providing secure fastening and vibration resistance
• Dual-drive versatility featuring both Phillips and slotted drive options (No. 1 size) for flexible installation with standard tools
• Optimized head design with rounded pan profile offering improved clearance and professional appearance
• Full threading coverage along the entire 1/2" length for maximum grip and load distribution
• Regulatory compliance assurance meeting ASME B18.6.3 standards and environmental regulations including RoHS 3 and REACH

Professional Applications & Engineering Value

These 2-56 UNC rounded pan head screws deliver critical performance advantages for precision assembly applications where corrosion resistance and mechanical reliability are paramount. The combination of 18-8 stainless steel material with passivated finish creates a protective barrier against chemical exposure and environmental degradation, making them ideal for electronics enclosures, medical devices, and marine equipment. The coarse UNC thread pattern with Class 2A fit ensures rapid installation and secure fastening in various materials, while the rounded pan head design provides both aesthetic appeal and functional clearance. The dual Phillips/slotted drive system accommodates multiple tool types, streamlining maintenance and assembly processes in industrial settings where tool availability varies.

Specification Summary & Compliance

This rounded pan head screw features precise dimensional control with Class 2A thread fit per UNC standards, ensuring consistent performance across applications. Manufacturing follows ASME B18.6.3 specifications for dimensional accuracy and quality assurance. The product maintains full compliance with RoHS 3 (2015/863/EU) restrictions on hazardous substances and REACH (EC 1907/2006) regulations for chemical safety, making them suitable for global industrial distribution and environmentally conscious manufacturing operations.