S-91773A191 8-32 x 5/16" ASME B18.6.3 Stainless Steel Round Head Phillips Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 Stainless Steel construction and passivated finish, ensuring long-term reliability in harsh environments
• Exceptional mechanical strength delivering 100,000 psi tensile strength and Rockwell B100 hardness for high-stress applications
• Precision threading with UNC coarse thread and Class 2A fit for secure, vibration-resistant fastening
• Optimized drive performance featuring Phillips No. 2 drive for efficient installation and reduced cam-out risk
• Full-threaded design providing maximum grip length and uniform load distribution across the entire fastener
• Rounded head profile offering smooth surface finish and improved aesthetic integration in visible applications
• Regulatory compliance meeting ASME B18.6.3 specifications and environmental standards including RoHS 3 and REACH

Professional Applications & Engineering Value

These 8-32 UNC rounded head Phillips screws deliver critical performance advantages for industrial fastening applications where corrosion resistance and mechanical reliability are paramount. The combination of 18-8 Stainless Steel material and passivated surface treatment creates a protective barrier against oxidation and chemical exposure, making them ideal for marine equipment, food processing machinery, and outdoor installations. The coarse UNC threading ensures rapid installation and superior holding power in various substrates, while the fully threaded design maximizes engagement depth for structural integrity. Engineered to withstand vibration and thermal cycling, these screws provide lasting performance in demanding environments where fastener failure is not an option.

Specification Summary & Compliance

This fastener maintains precise Class 2A thread fit tolerances according to UNC standards, ensuring consistent mating with corresponding nuts and threaded holes. Manufacturing complies with ASME B18.6.3 specifications for dimensional accuracy and mechanical properties. The product meets RoHS 3 (2015/863/EU) compliance for restricted substance control and REACH (EC 1907/2006) regulations regarding chemical safety. Thread specifications include 8-32 UNC coarse thread with full threading along the 5/16" length, providing reliable performance across industrial applications requiring standardized fastening solutions.