S-90825A140 4-40 x 1/4" Sealing Stainless Steel Pan Head Phillips Screws

Key Features & Benefits at a Glance

• Superior sealing performance with integrated Buna-N rubber O-ring, rated for pressures up to 6000 psi to prevent leaks in demanding applications.
• Excellent corrosion resistance from 18-8 Stainless Steel construction and passivated finish, ensuring long-term reliability in harsh environments.
• Broad temperature compatibility with an O-ring range of -40° to 225° F, suitable for diverse industrial operating conditions.
• High tensile strength of 70,000 psi provides secure, vibration-resistant fastening for critical assemblies.
• Precise thread fit with Class 2A UNC coarse threads ensures easy installation and consistent engagement.
• Reliable drive engagement via Phillips No. 1 drive, reducing cam-out risk during assembly with standard tools.
• Full regulatory compliance with RoHS 3 and REACH, meeting international environmental and safety standards.

Professional Applications & Engineering Value

This 4-40 UNC rounded head Phillips screw is engineered to address critical sealing challenges in industrial equipment, fluid systems, and enclosures exposed to moisture, chemicals, or pressure variations. The combination of 18-8 Stainless Steel and a passivated finish resists oxidation and chemical attack, while the Buna-N rubber O-ring creates a dependable seal that maintains integrity across a wide temperature range (-40° to 225° F). Its coarse thread design and Class 2A thread fit facilitate quick installation and reduce cross-threading risks, making it ideal for maintenance and production lines where speed and reliability are paramount. Fully threaded for maximum grip, this sealing screw is a trusted solution for applications requiring consistent pressure containment up to 6000 psi.

Specification Summary & Compliance

This screw features a 4-40 UNC coarse thread with Class 2A thread fit for precise dimensional accuracy and easy assembly. It is fully threaded, with a length of 1/4", pan-style rounded head, and Phillips No. 1 drive. Manufactured from 18-8 Stainless Steel with a passivated finish, it includes a Buna-N O-ring rated for temperatures from -40° to 225° F. The product complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring adherence to environmental and safety standards for industrial use.