S-91773A591 5/16"-18 x 2" 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, ideal for harsh industrial environments
• High tensile strength of 100,000 psi ensures reliable performance under heavy loads and vibration
• Excellent thread engagement with fully threaded UNC coarse threads and Class 2A fit for secure fastening
• Optimized drive efficiency with No. 3 Phillips drive style providing positive torque transmission
• Enhanced durability with Rockwell B100 hardness maintaining structural integrity over repeated use
• Industry-standard compliance meeting ASME B18.6.3 specifications for dimensional accuracy and performance
• Environmental responsibility with RoHS 3 and REACH compliance for safe use in regulated applications

Professional Applications & Engineering Value

These 18-8 stainless steel rounded head Phillips screws deliver exceptional engineering value in demanding industrial applications where corrosion resistance and mechanical strength are critical. The combination of fully threaded UNC coarse threads and Class 2A fit ensures rapid installation and secure fastening in machinery, equipment assembly, and structural components. The passivated finish significantly enhances the natural corrosion resistance of stainless steel, making these screws ideal for outdoor applications, marine environments, and chemical processing facilities where moisture and corrosive agents are present. The rounded head design with Phillips drive provides a clean aesthetic while facilitating efficient installation in confined spaces. With their 100,000 psi tensile strength and consistent performance across temperature variations, these fasteners solve critical challenges in maintenance, manufacturing, and infrastructure projects requiring reliable, long-term fastening solutions.

Specification Summary & Compliance

This 5/16"-18 x 2" rounded head Phillips screw features precision UNC coarse threads with Class 2A tolerance for consistent fit and performance. Manufacturing and dimensional specifications strictly adhere to ASME B18.6.3 standards, ensuring interchangeability and reliability across industrial applications. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming environmental safety and material restrictions adherence. The 18-8 stainless steel material with passivated surface treatment maintains dimensional stability while providing enhanced corrosion protection in demanding service conditions.