S-90825A342 4-40 x 5/16" Sealing Stainless Steel Pan Head Phillips Screws

Key Features & Benefits at a Glance

• Superior sealing performance with Fluoroelastomer O-Ring, providing reliable leak prevention in high-pressure environments up to 6000 psi
• Excellent corrosion resistance from 18-8 Stainless Steel construction and passivated finish, ensuring long-term durability in harsh industrial conditions
• Wide temperature compatibility (-20° to 400°F) for versatile application across various operating environments
• Precise thread engagement with Class 2A UNC coarse threads, enabling quick installation and secure fastening
• Optimized drive performance with Phillips No. 1 drive style and rounded pan head design for efficient torque application
• Full threading capability providing maximum grip strength and uniform load distribution
• Regulatory compliance assurance meeting RoHS 3 and REACH standards for environmental safety

Professional Applications & Engineering Value

This 4-40 UNC rounded head Phillips screw delivers exceptional engineering value in demanding industrial applications where fluid sealing and corrosion resistance are critical. The combination of 18-8 stainless steel material with passivated finish provides superior protection against chemical exposure and environmental degradation, while the Fluoroelastomer rubber O-ring maintains its sealing integrity across a broad temperature spectrum from -20° to 400°F. The Class 2A thread fit with coarse UNC threading ensures rapid installation and reliable performance in high-vibration environments, making it ideal for pressure vessels, hydraulic systems, and industrial equipment requiring dependable sealing solutions under extreme conditions up to 6000 psi.

Specification Summary & Compliance

This sealing screw features precise Class 2A thread fit with 4-40 UNC coarse threading and right-hand thread direction, manufactured to exact dimensional specifications including 5/16" length and 0.238" head diameter. The product complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe usage in industrial applications. The fully threaded design with standard rounded pan head profile provides consistent performance across the entire fastener length.