S-91772A552 1/4"-20 x 2 1/2" 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
• High mechanical strength with 70,000 psi tensile strength and Rockwell B70 hardness for reliable load-bearing performance
• Precise thread engagement through UNC coarse threading and Class 2A fit, ensuring secure fastening and vibration resistance
• Optimized drive efficiency with Phillips No. 3 drive style, providing excellent torque transfer and reduced cam-out risk
• Versatile partial threading allowing unthreaded shank sections for precise clamping and alignment in assembled components
• Regulatory compliance assurance meeting ASME B18.6.3 specifications and environmental standards including RoHS 3 and REACH
• Enhanced installation convenience with rounded pan head profile offering smooth surface transition and reduced snagging

Professional Applications & Engineering Value

These passivated 18-8 stainless steel rounded head screws deliver exceptional performance in demanding industrial applications where corrosion resistance and mechanical reliability are critical. The UNC coarse thread configuration provides superior engagement in various materials, while the partial threading design prevents over-tightening and maintains structural integrity in assembled joints. The Phillips No. 3 drive ensures efficient installation with standard tools, reducing assembly time in manufacturing and maintenance operations. Engineered to withstand vibration and environmental exposure, these industrial screws are particularly valuable in machinery assembly, electrical enclosures, and outdoor equipment where 70,000 psi tensile strength and regulatory compliance are essential requirements.

Specification Summary & Compliance

Manufactured to precise dimensional standards with Class 2A thread fit tolerance and UNC coarse thread specification. Complies with ASME B18.6.3 mechanical standards for dimensional accuracy and performance. Meets environmental regulations including RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance requirements. Thread specifications include 1/4"-20 size with right-hand direction and partial threading configuration.