S-90825A831 4-40 x 3/16" Sealing Stainless Steel Pan Head Phillips Screws

Key Features & Benefits at a Glance

• Superior sealing performance with integrated Buna-N rubber O-ring to prevent fluid and gas leaks in demanding applications
• Exceptional corrosion resistance thanks to 18-8 stainless steel construction and passivated surface treatment for extended service life
• High-pressure capability withstands up to 6000 psi, ensuring reliable performance in hydraulic and pneumatic systems
• Wide temperature tolerance with O-ring functionality maintained from -30° to 250°F for versatile industrial use
• Precision threading with Class 2A UNC coarse threads for easy installation and secure fastening in various materials
• Optimized drive design featuring Phillips No. 1 drive for efficient torque application and reduced cam-out risk
• Regulatory compliance meeting RoHS 3 and REACH standards for environmentally responsible manufacturing

Professional Applications & Engineering Value

This 4-40 UNC rounded head Phillips screw delivers critical sealing solutions where fluid containment and pressure integrity are paramount. The combination of 18-8 stainless steel material and passivated finish provides exceptional corrosion resistance in harsh environments, while the integrated Buna-N rubber O-ring creates a reliable seal that maintains integrity across extreme temperature fluctuations (-30° to 250°F). Engineered with Class 2A thread fit and coarse thread spacing, these sealing screws install quickly and securely in equipment requiring pressure containment up to 6000 psi. Ideal for hydraulic systems, pneumatic controls, fluid handling equipment, and industrial machinery where leak prevention is critical to operational safety and efficiency.

Specification Summary & Compliance

This fully threaded 4-40 UNC screw features precise Class 2A thread fit with right-hand threading and standard pan head profile. Manufactured to exacting standards with 0.112" thread diameter and 3/16" length, ensuring dimensional accuracy for consistent performance. The product complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming adherence to international environmental and safety standards for industrial components.