S-98070A162 8-32 x 5/8" Sealing Stainless Steel Phillips Flat Head Screws

Key Features & Benefits at a Glance

• Superior sealing performance with integrated Buna-N rubber O-ring that withstands pressures up to 1500 psi
• Excellent corrosion resistance thanks to 18-8 stainless steel construction and passivated surface treatment
• Wide temperature compatibility from -40° to 225°F for diverse industrial environments
• Reliable thread engagement with Class 2A fit and UNC coarse threads for secure fastening
• Flush mounting capability through undercut flat head design that sits perfectly countersunk
• Easy installation with Phillips No. 2 drive that provides positive torque transmission
• Full thread coverage along the entire 5/8" length for maximum holding power

Professional Applications & Engineering Value

This 8-32 UNC flat head Phillips screw delivers exceptional engineering value in demanding sealing applications where fluid containment and environmental protection are critical. The combination of 18-8 stainless steel material with passivated finish provides outstanding corrosion resistance in harsh industrial environments, while the integrated Buna-N rubber O-ring creates a reliable seal against liquids, gases, and contaminants. The undercut flat head profile ensures proper seating in countersunk holes, preventing protrusion in precision assemblies. These sealing screws are particularly valuable in hydraulic systems, pneumatic equipment, and electronic enclosures where pressure integrity and environmental sealing are essential for operational reliability and longevity.

Specification Summary & Compliance

This fastener features precision UNC coarse threads with Class 2A thread fit for consistent engagement and reliable performance. The fully threaded 5/8" length provides maximum holding strength, while the 100° countersink angle accommodates standard machining practices. Manufactured to exacting standards, this product is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting the latest environmental regulations for industrial components. The screw maintains dimensional accuracy with specified head diameter of 0.332" and thread diameter of 0.164" for consistent fit in applications requiring maximum hole diameter of 0.179".