S-90825A129 2-56 x 1/2" Sealing Stainless Steel Pan Head Phillips Screws

Key Features & Benefits at a Glance

• Reliable Sealing Under High Pressure: Integrated Buna-N rubber O-ring ensures effective sealing up to 6000 psi, preventing leaks in demanding industrial environments.
• Exceptional Tensile Strength: Made from 18-8 stainless steel with a tensile strength of 70,000 psi, offering superior durability and resistance to mechanical stress.
• Wide Temperature Compatibility: O-ring functions effectively in temperatures from -40° to 225° F, suitable for varied operational conditions.
• Corrosion Resistance: Passivated finish enhances the stainless steel's natural corrosion resistance, extending service life in harsh conditions.
• Easy Installation and Secure Fit: Phillips drive (No. 1) and Class 2A thread fit provide straightforward assembly and reliable fastening with coarse UNC threads.
• Fully Threaded Design: Ensures consistent engagement and holding power along the entire 1/2" length, improving fastener integrity.
• Compliance with Environmental Standards: Meets RoHS 3 and REACH regulations, ensuring safety and environmental responsibility in industrial applications.

Professional Applications & Engineering Value

This 2-56 UNC rounded head Phillips screw is engineered to address critical sealing challenges in industrial settings. The combination of 18-8 stainless steel and a Buna-N rubber O-ring provides a robust solution for applications requiring leak-proof connections under high pressure, such as in hydraulic systems, pneumatic equipment, and fluid handling assemblies. The passivated finish enhances corrosion resistance, making it ideal for environments exposed to moisture or chemicals. With a coarse thread and Class 2A fit, it ensures quick installation and secure fastening, reducing assembly time and maintenance needs. This screw is particularly valuable in industries like automotive, aerospace, and manufacturing, where reliability and compliance with RoHS and REACH standards are paramount for operational safety and efficiency.

Specification Summary & Compliance

This screw features a 2-56 UNC coarse thread with Class 2A thread fit for precise dimensional accuracy, ensuring consistent performance in right-hand threading applications. It is fully threaded with a length of 1/2 inch and a pan-style rounded head for uniform contact. Manufactured from 18-8 stainless steel with a passivated finish, it adheres to industry standards for durability and corrosion resistance. The product is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for use in regulated environments without hazardous substances.