S-90825A348 4-40 x 5/8" Sealing Stainless Steel Pan Head Phillips Screws

Key Features & Benefits at a Glance

• Superior Sealing Performance: Integrated Fluoroelastomer O-Ring provides a reliable seal against fluids and gases, capable of withstanding pressures up to 6000 psi, ideal for high-pressure industrial environments.
• Excellent Corrosion Resistance: Made from 18-8 Stainless Steel with a passivated finish, offering enhanced durability and long-term performance in harsh or corrosive conditions.
• Wide Temperature Tolerance: O-Ring functions effectively across a broad temperature range from -20° to 400° F, ensuring consistent sealing in varied operational climates.
• Precise and Reliable Threading: Class 2A thread fit with UNC coarse threads ensures easy installation, secure fastening, and reduced risk of cross-threading in assembly applications.
• Convenient Drive Design: Phillips No. 1 drive allows for efficient and straightforward installation with standard tools, speeding up assembly processes.
• Robust Material Strength: High tensile strength of 70,000 psi provides dependable load-bearing capacity, reducing the likelihood of fastener failure under stress.
• Compliance with Environmental Standards: RoHS 3 and REACH compliant, meeting stringent regulations for safe and sustainable use in industrial and electronic assemblies.

Professional Applications & Engineering Value

This 4-40 UNC Rounded Head Phillips Screw is engineered to address critical sealing challenges in demanding industrial settings. Constructed from 18-8 Stainless Steel and featuring a passivated finish, it resists corrosion effectively, making it suitable for applications in chemical processing, marine equipment, and outdoor machinery. The inclusion of a Fluoroelastomer O-Ring ensures a tight seal against high pressures up to 6000 psi and extreme temperatures, preventing leaks in hydraulic systems, pneumatic controls, and fluid transfer assemblies. Its Class 2A thread fit and coarse UNC threading facilitate quick and secure installation, minimizing assembly time and enhancing reliability in automated production lines. Ideal for OEMs and maintenance teams, this screw provides a dependable solution for sealing and fastening in high-stress environments, reducing downtime and maintenance costs.

Specification Summary & Compliance

This screw adheres to precise dimensional standards, including Class 2A thread fit for consistent accuracy and UNC coarse threads (4-40 size) to ensure compatibility with standard nuts and tapped holes. The fully threaded design and 5/8" length provide uniform fastening strength. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for environmentally conscious industrial applications without hazardous substances.