S-91772A620 5/16"-18 x 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 environments and extended service life
• Exceptional mechanical strength delivering 70,000 psi tensile strength and Rockwell B70 hardness for reliable load-bearing performance
• Optimized for quick installation featuring a No. 4 Phillips drive and pan head design for efficient driving and reduced assembly time
• Precise thread engagement with UNC coarse threads and Class 2A fit ensuring consistent, secure fastening in various materials
• Full-threaded design maximizes grip length and pull-out resistance across the entire fastener length
• Compliance with major industry standards including ASME B18.6.3 for dimensional accuracy and quality assurance
• Environmentally responsible manufacturing meeting RoHS 3 and REACH regulations for safe use in regulated industries

Professional Applications & Engineering Value

Engineered for demanding industrial environments, these passivated 18-8 stainless steel pan head screws solve critical challenges in machinery assembly, electrical enclosures, and structural frameworks. The combination of corrosion-resistant material and passivation surface treatment provides exceptional protection against oxidation and chemical exposure, significantly reducing maintenance frequency in humid or corrosive settings. The UNC coarse threading and Class 2A thread fit ensure rapid installation with minimal cross-threading risk, while the fully threaded design maintains consistent clamping force across joint interfaces. With their 70,000 psi tensile strength, these Phillips drive screws deliver reliable performance in vibration-prone applications where fastener integrity is paramount for operational safety and equipment longevity.

Specification Summary & Compliance

This 5/16"-18 x 1/2" pan head screw features precise UNC coarse threads with Class 2A thread fit tolerances, manufactured to ASME B18.6.3 specifications for dimensional consistency. The fastener maintains full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring adherence to international safety and substance restriction standards for industrial components.