S-90825A146 4-40 x 1/2" Sealing Stainless Steel Pan Head Phillips Screws

Key Features & Benefits at a Glance

• Reliable Sealing Performance: Integrated Buna-N O-ring provides effective sealing against dust, moisture, and fluids, maintaining integrity in demanding environments.
• High Corrosion Resistance: Made from 18-8 stainless steel with a passivated finish, offering excellent durability and longevity in harsh or humid conditions.
• Superior Pressure Handling: Withstands maximum pressures up to 6000 psi, ensuring secure fastening in high-pressure industrial applications.
• Wide Temperature Tolerance: O-ring functions reliably across a broad temperature range from -40° to 225° F, suitable for varied operational climates.
• Strong Tensile Strength: 70,000 psi tensile strength provides robust holding power, reducing the risk of fastener failure under stress.
• Easy Installation: Phillips drive (No. 1 size) and rounded pan head design allow for quick, straightforward assembly with standard tools.
• Precision Thread Fit: Class 2A UNC coarse threads ensure consistent, accurate engagement and ease of use in repetitive applications.

Professional Applications & Engineering Value

This 4-40 UNC rounded head Phillips screw with an integrated Buna-N O-ring is engineered to address critical sealing challenges in industrial settings. Constructed from 18-8 stainless steel and featuring a passivated finish, it resists corrosion and wear, making it ideal for applications in machinery, automotive, and fluid systems where exposure to moisture, chemicals, or varying temperatures is common. The fully threaded design and coarse thread spacing enhance grip and vibration resistance, while the sealing capability prevents leaks and contamination. This screw is particularly valuable in assemblies requiring reliable pressure containment up to 6000 psi, such as hydraulic components, enclosures, and precision equipment, ensuring long-term performance and reduced maintenance needs.

Specification Summary & Compliance

This screw adheres to UNC thread standards with a Class 2A thread fit for precise dimensional accuracy and ease of assembly. It is fully threaded with a 4-40 thread size and right-hand direction, and the rounded pan head design complements the Phillips drive for efficient installation. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations ensures it meets environmental and safety standards for industrial use, supporting sustainable procurement practices.