S-91802A535 1/4"-20 x 3/8" 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 for extended service life in harsh environments
• Exceptional holding power with 80,000 psi tensile strength and Rockwell B80 hardness for reliable performance under heavy loads
• Optimized installation efficiency with No. 3 Phillips drive and fully threaded UNC coarse spacing for quick, secure fastening
• Enhanced flush mounting capability featuring undercut oval head design with 82° countersink angle for clean, professional finishes
• Precision thread engagement with Class 2A thread fit ensuring consistent performance and vibration resistance
• Regulatory compliance assurance meeting ASME B18.6.3 specifications and RoHS 3/REACH environmental standards
• Versatile right-hand threading compatible with standard industrial applications and replacement scenarios

Professional Applications & Engineering Value

These passivated 18-8 stainless steel oval head screws deliver critical corrosion protection where moisture, chemicals, or outdoor exposure threaten fastener integrity. The undercut oval head profile with 82° countersink angle provides superior flush mounting in precision applications, eliminating protrusions that could interfere with moving components or compromise aesthetic requirements. The combination of 80,000 psi tensile strength and fully threaded UNC coarse spacing ensures maximum thread engagement and clamping force in materials ranging from metal fabrications to industrial equipment assemblies. Engineered for industrial flat head screw applications, these fasteners maintain reliability in demanding environments while the No. 3 Phillips drive offers familiar, efficient installation for maintenance and production teams.

Specification Summary & Compliance

Manufactured to exacting ASME B18.6.3 specifications with Class 2A thread fit tolerance for consistent performance. Features 1/4"-20 UNC coarse threads with right-hand direction and full threading along the 3/8" length. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across various industrial sectors. The passivated 18-8 stainless steel construction provides inherent corrosion resistance while meeting mechanical requirements of 80,000 psi tensile strength and Rockwell B80 hardness.