S-98070A159 8-32 x 1/2" Sealing Stainless Steel Phillips Flat Head Screws

Key Features & Benefits at a Glance

• Reliable sealing performance with integrated Buna-N rubber O-ring that withstands pressures up to 1500 psi, preventing leaks in demanding industrial environments
• Superior corrosion resistance thanks to 18-8 stainless steel construction and passivated finish, ensuring long-term durability in harsh conditions
• Broad temperature compatibility with O-ring rated from -40° to 225°F, maintaining seal integrity across extreme thermal variations
• Precise thread engagement with Class 2A UNC coarse threads providing secure fastening and easy installation in various materials
• Optimized flush mounting featuring undercut flat head design that sits perfectly countersunk at 100° angle for smooth surface finish
• High tensile strength of 70,000 psi ensures structural integrity under mechanical stress and vibration
• Environmental compliance meeting RoHS 3 and REACH regulations for safe use in regulated industrial applications

Professional Applications & Engineering Value

This 8-32 UNC flat head Phillips screw with integrated Buna-N rubber O-ring addresses critical sealing challenges in industrial equipment and machinery. The combination of 18-8 stainless steel material and passivated finish provides exceptional corrosion resistance for applications exposed to moisture, chemicals, or outdoor elements. The undercut flat head profile ensures proper countersinking while the Phillips No. 2 drive facilitates efficient installation. Engineered for high-pressure environments up to 1500 psi, this sealing screw is ideal for hydraulic systems, pneumatic equipment, fluid handling systems, and industrial enclosures where reliable sealing is paramount. The coarse UNC threading and Class 2A fit guarantee secure fastening in various materials while the temperature-resistant O-ring maintains performance across extreme operating conditions.

Specification Summary & Compliance

This fastener features precision 8-32 UNC coarse threads with Class 2A fit for consistent engagement and reliable performance. The flat head design incorporates a 100° countersink angle and undercut profile for optimal flush mounting. Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and regulatory compliance for industrial applications worldwide. The combination of 18-8 stainless steel material and passivated finish provides enhanced corrosion resistance while maintaining the 70,000 psi tensile strength required for demanding mechanical applications.