S-91772A636 5/16"-18 x 3" 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 performance under heavy loads
• Optimized drive engagement featuring No. 4 Phillips drive for secure installation and reduced cam-out risk
• Precision threading with Class 2A thread fit ensuring consistent engagement and vibration resistance
• Versatile partial threading design providing both secure fastening and clearance where needed
• Regulatory compliance meeting ASME B18.6.3 specifications and environmental standards including RoHS 3 and REACH
• Enhanced durability with coarse UNC threads that resist stripping and maintain integrity through repeated use

Professional Applications & Engineering Value

These 5/16"-18 UNC coarse thread pan head Phillips screws deliver exceptional engineering value across industrial applications where corrosion resistance and mechanical reliability are paramount. The passivated 18-8 stainless steel construction provides superior protection against chemical exposure and environmental degradation, making them ideal for manufacturing equipment, machinery assembly, and outdoor installations. The partially threaded design offers precise clamping force control while the coarse thread pattern ensures rapid installation and superior vibration resistance in high-stress environments. With their rounded pan head profile and No. 4 Phillips drive, these fasteners combine easy installation with professional-grade performance, solving common challenges of fastener corrosion, thread stripping, and maintenance accessibility in demanding industrial settings.

Specification Summary & Compliance

Manufactured to exacting Class 2A thread fit tolerances with UNC coarse threading (5/16"-18) and partial threading configuration. These screws conform to ASME B18.6.3 mechanical and dimensional specifications, ensuring interchangeability and reliability. Environmental compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) standards, confirming they contain no restricted substances. The combination of precise dimensional control and comprehensive regulatory adherence makes these fasteners suitable for quality-critical industrial applications requiring documented compliance.