S-91772A634 5/16"-18 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 with Class 2A thread fit ensuring consistent assembly and vibration resistance
• Optimized drive efficiency through Phillips No. 4 drive design for secure torque transmission and reduced cam-out
• Versatile partial threading allowing precise clamping control in multi-material applications
• Industry-standard compliance meeting ASME B18.6.3 specifications for dimensional accuracy and interchangeability
• Environmental regulation adherence with RoHS 3 and REACH compliance for global supply chain integration

Professional Applications & Engineering Value

Engineered for demanding industrial fastening applications, these passivated 18-8 stainless steel pan head screws deliver exceptional performance where corrosion resistance and mechanical reliability are critical. The 5/16"-18 UNC coarse thread configuration provides rapid installation in metal assemblies, electrical enclosures, and machinery components, while the partial threading design enables precise joint compression without unnecessary thread engagement. The rounded pan head profile with Phillips No. 4 drive offers low-profile seating and efficient torque transfer, reducing installation time in high-volume production environments. These ASME B18.6.3 compliant screws maintain dimensional consistency across batches, ensuring replacement part compatibility in maintenance and repair operations.

Specification Summary & Compliance

This 2 1/2" length screw features Class 2A thread fit tolerance with 1 1/2" minimum thread length and coarse UNC threading per standardized specifications. Manufacturing complies with ASME B18.6.3 dimensional requirements, ensuring interchangeability across industrial applications. The product meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental compliance standards, making it suitable for regulated industries and international markets.