S-91770A590 5/16"-18 x 2" ASME B18.6.3 Stainless Steel Truss Head Phillips Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with passivated 18-8 stainless steel construction for extended service life in harsh environments
• Exceptional load-bearing capacity with 70,000 psi tensile strength and Rockwell B70 hardness for reliable performance under stress
• Enhanced stability and surface contact through wide truss head design that distributes clamping force effectively
• Secure and efficient installation with No. 4 Phillips drive that prevents cam-out during high-torque applications
• Reliable thread engagement with fully threaded UNC coarse thread design for faster assembly and superior holding power
• Precision manufacturing with Class 2A thread fit ensuring consistent performance and interchangeability
• Full regulatory compliance meeting ASME B18.6.3 standards, RoHS 3, and REACH for global industrial applications

Professional Applications & Engineering Value

These passivated 18-8 stainless steel screws deliver exceptional engineering value in demanding industrial environments where corrosion resistance and structural integrity are paramount. The rounded truss head design provides superior load distribution, preventing surface damage and maintaining seal integrity in sheet metal assemblies, electrical enclosures, and machinery panels. The UNC coarse threading ensures rapid installation and reliable performance in vibration-prone applications, while the fully threaded construction offers maximum grip length for secure fastening in varying material thicknesses. Engineered to withstand harsh chemicals, moisture, and temperature variations, these industrial screws solve critical fastening challenges in manufacturing, construction, and heavy equipment applications where failure is not an option.

Specification Summary & Compliance

Manufactured to precise dimensional standards with Class 2A thread fit tolerance for consistent performance. Thread specifications conform to 5/16"-18 UNC coarse thread standards with full threading along the 2" length. Compliant with ASME B18.6.3 manufacturing specifications for dimensional accuracy and mechanical properties. Meets RoHS 3 (2015/863/EU) compliance for restricted substances and REACH (EC 1907/2006) regulations for chemical safety, ensuring environmental responsibility and global market acceptance.