S-90825A619 4-40 x 5/8" Sealing Stainless Steel Pan Head Phillips Screws

Key Features & Benefits at a Glance

• Superior sealing performance with a silicone rubber O-ring that reliably withstands pressures up to 6000 psi and extreme temperatures from -80° to 400°F, preventing leaks in demanding environments.
• Excellent corrosion resistance provided by 18-8 stainless steel construction and a passivated finish, ensuring long-term durability and reliability in harsh or wet conditions.
• Secure and efficient installation with a Phillips drive (No. 1) and rounded pan head design, allowing for easy driving and a flush, low-profile finish.
• Precise thread engagement thanks to UNC coarse threading and Class 2A thread fit, enabling quick assembly and reducing the risk of cross-threading in industrial applications.
• Full threading along the 5/8" length ensures maximum grip and uniform clamping force, ideal for components requiring consistent sealing pressure.
• Compliance with environmental regulations including RoHS 3 and REACH, making it suitable for use in regulated industries and global supply chains.
• Versatile hole compatibility with a maximum hole diameter of 0.127", facilitating easy integration into standard designs without modification.

Professional Applications & Engineering Value

This 4-40 UNC rounded head Phillips screw is engineered to address critical sealing challenges in industrial settings where fluid or gas containment is essential. The combination of 18-8 stainless steel and a passivated finish offers robust resistance to corrosion, extending service life in environments exposed to moisture, chemicals, or outdoor elements. The integrated silicone rubber O-ring provides a reliable seal that maintains integrity under high-pressure conditions (up to 6000 psi) and across a wide temperature range (-80° to 400°F), making it ideal for applications in hydraulic systems, pneumatic equipment, and automotive assemblies. The coarse UNC threads and Class 2A fit ensure quick, secure fastening, reducing installation time and minimizing the risk of thread damage. This screw is particularly valuable in industries such as manufacturing, aerospace, and electronics, where sealing fasteners must deliver consistent performance without compromising on compliance or durability.

Specification Summary & Compliance

This screw adheres to UNC coarse thread standards with a Class 2A thread fit for precise dimensional accuracy and ease of assembly. It is manufactured from 18-8 stainless steel with a passivated finish to enhance corrosion resistance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets stringent environmental and safety requirements for industrial use.