S-91802A196 8-32 x 5/8" ASME B18.6.3 Stainless Steel Phillips Oval Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with passivated 18-8 stainless steel construction, ideal for harsh environments
• Exceptional mechanical strength with 80,000 psi tensile strength and Rockwell B80 hardness for reliable load-bearing performance
• Optimized thread engagement through UNC coarse threading and Class 2A fit ensures secure fastening and vibration resistance
• Streamlined installation with Phillips No. 2 drive and standard oval head profile for efficient assembly
• Enhanced durability with full threading and 82° countersink angle for flush mounting and reduced stress concentration
• Regulatory compliance meeting ASME B18.6.3 specifications and environmental standards including RoHS 3 and REACH
• Precision dimensional accuracy with 0.312" head diameter and 5/8" length for consistent performance in industrial applications

Professional Applications & Engineering Value

These passivated 18-8 stainless steel oval head screws deliver critical engineering solutions where corrosion resistance and mechanical reliability are paramount. The combination of UNC coarse threading and Class 2A thread fit ensures rapid installation with minimal cross-threading risk, while the Phillips drive provides secure torque transmission during assembly. The oval head design with standard profile offers a finished appearance while maintaining structural integrity, making these flat head screws ideal for machinery, electrical enclosures, and marine equipment where exposure to moisture, chemicals, or temperature variations would compromise inferior fasteners. With 80,000 psi tensile strength, they maintain clamping force under dynamic loads, preventing joint failure in vibration-intensive applications.

Specification Summary & Compliance

Manufactured to precise dimensional standards including Class 2A thread fit and UNC coarse thread specifications. Fully compliant with ASME B18.6.3 manufacturing standards, ensuring interchangeability and reliability. Meets environmental regulations including RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, confirming suitability for restricted substance-sensitive applications. Thread specifications include #8-32 size with right-hand direction and coarse spacing, while mechanical properties maintain Rockwell B80 hardness and 80,000 psi tensile strength thresholds.