S-91772A548 1/4"-20 x 1 3/4" ASME B18.6.3 Stainless Steel Pan Head Phillips Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with passivated 18-8 stainless steel construction, ideal for harsh industrial environments
• Exceptional mechanical strength with 70,000 psi tensile strength and Rockwell B70 hardness for reliable load-bearing performance
• Optimized drive engagement through Phillips No. 3 drive design, preventing cam-out during high-torque installation
• Precise thread compatibility with UNC coarse spacing and Class 2A fit, ensuring smooth assembly and vibration resistance
• Full-threaded design providing maximum grip length and uniform stress distribution across the entire fastener
• Standard-compliant manufacturing meeting ASME B18.6.3 specifications for dimensional accuracy and performance reliability
• Environmental compliance with RoHS 3 and REACH regulations, suitable for regulated industrial applications

Professional Applications & Engineering Value

These 1/4"-20 pan head Phillips screws deliver critical performance advantages in demanding industrial settings. The passivated 18-8 stainless steel construction provides exceptional resistance to corrosion and chemical exposure, making them ideal for manufacturing equipment, outdoor machinery, and marine applications. The combination of UNC coarse threading and Class 2A thread fit ensures rapid assembly while maintaining vibration resistance in high-stress environments. The pan head design with Phillips No. 3 drive offers superior torque transmission without damaging the drive recess, while the fully threaded configuration maximizes clamping force distribution. These industrial screws solve common fastening challenges including material degradation, installation efficiency, and long-term reliability in critical assemblies.

Specification Summary & Compliance

This 1/4"-20 x 1 3/4" pan head screw features precise Class 2A thread fit with UNC coarse thread spacing (20 threads per inch) and right-hand threading. Manufacturing complies with ASME B18.6.3 standards for dimensional accuracy and mechanical properties. The fastener is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring suitability for various industrial applications requiring strict material compliance.