S-91735A411 5/16"-18 x 1" ASME B18.6.3 Stainless Steel Pan Head Phillips Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction, ideal for harsh industrial and marine environments
• Exceptional mechanical strength delivering 80,000 psi tensile strength and Rockwell B85 hardness for heavy-duty applications
• Enhanced environmental protection through passivated finish that extends service life in corrosive conditions
• Reliable fastening performance with fully threaded UNC coarse spacing and Class 2A thread fit for secure connections
• Optimized drive engagement featuring No. 4 Phillips drive for efficient installation and reduced cam-out
• Broad compatibility with standard 5/16"-18 UNC threading for versatile application across industrial equipment
• Regulatory compliance assurance meeting ASME B18.6.3 standards and environmental regulations for global supply chain integration

Professional Applications & Engineering Value

These 316 stainless steel pan head screws deliver critical performance advantages in demanding environments where corrosion resistance and structural integrity are paramount. The combination of fully threaded UNC coarse spacing and Class 2A thread fit ensures rapid installation and vibration-resistant fastening in industrial machinery, marine hardware, and chemical processing equipment. The passivated finish provides an additional protective layer that significantly extends service life in saltwater exposure and chemical-rich atmospheres. With their rounded pan head profile and No. 4 Phillips drive, these screws offer both aesthetic cleanliness and practical installation efficiency, making them ideal for applications requiring both performance and appearance considerations in OEM manufacturing and maintenance operations.

Specification Summary & Compliance

This 5/16"-18 UNC screw maintains precise Class 2A thread fit tolerances with coarse thread spacing for optimal engagement. Manufactured to ASME B18.6.3 specifications for dimensional consistency and mechanical performance. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring suitability for global industrial applications and responsible material sourcing.