S-90604A549 1/4"-20 x 1 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 demanding industrial applications
• Wide compatibility and easy installation with combined Phillips/Slotted drive (No. 3) accommodating various tool types
• Reliable thread engagement through fully threaded UNC coarse spacing and Class 2A thread fit for secure fastening
• Optimized head design with rounded pan head profile providing good bearing surface and clearance
• Industry-standard compliance meeting ASME B18.6.3 specifications for consistent quality and performance
• Environmental regulation adherence with RoHS 3 and REACH compliance for safe use across global markets

Professional Applications & Engineering Value

These 18-8 stainless steel rounded head screws deliver critical performance advantages for industrial applications where corrosion resistance and mechanical integrity are paramount. The passivated finish significantly enhances the natural corrosion resistance of stainless steel, making these UNC threaded screws ideal for marine environments, chemical processing equipment, food processing machinery, and outdoor infrastructure. The combination of Phillips/Slotted drive provides installation flexibility across different maintenance scenarios, while the Class 2A thread fit ensures consistent engagement without binding. With 100,000 psi tensile strength, these fully threaded fasteners maintain clamping force under vibration and load variations, solving common failure points in heavy-duty assemblies. The 1/4"-20 thread size with coarse spacing offers quick installation and reliable performance in various materials from metals to reinforced plastics.

Specification Summary & Compliance

This 1/4"-20 x 1-1/2" rounded head screw features precision UNC threads with Class 2A fit ensuring proper engagement and interchangeability. Manufactured to ASME B18.6.3 standards for dimensional accuracy and performance reliability. The fastener is fully compliant with RoHS 3 (2015/863/EU) restrictions on hazardous substances and REACH (EC 1907/2006) regulations for chemical safety. The combination of 18-8 stainless steel material with passivated surface treatment provides optimal corrosion protection while maintaining the mechanical properties required for industrial applications.