S-90825A346 4-40 x 1/2" Sealing Stainless Steel Pan Head Phillips Screws

Key Features & Benefits at a Glance

• Superior sealing performance with Fluoroelastomer O-Rings, effectively preventing leaks in high-pressure environments up to 6000 psi
• Excellent corrosion resistance thanks to the 18-8 Stainless Steel construction and passivated finish, ensuring long-term durability in harsh conditions
• High tensile strength of 70,000 psi provides reliable fastening integrity under demanding mechanical loads
• Broad temperature compatibility from -20° to 400° F, maintaining seal and material properties across varied operating environments
• Precise Class 2A thread fit with UNC coarse threading for easy installation and secure engagement in standard tapped holes
• Convenient Phillips drive (No. 1) allows for efficient assembly with common tools, reducing installation time
• Full regulatory compliance with RoHS 3 and REACH, ensuring safe use in regulated industries and global markets

Professional Applications & Engineering Value

This 4-40 UNC Rounded Head Phillips Sealing Screw is engineered to address critical sealing challenges in industrial applications where pressure integrity and environmental resistance are paramount. The combination of 18-8 Stainless Steel material and passivated finish provides exceptional corrosion resistance, making it ideal for chemical processing, marine, and outdoor equipment. The integrated Fluoroelastomer O-Ring creates a reliable seal that withstands maximum pressures of 6000 psi, solving leakage issues in hydraulic systems, pneumatic controls, and fluid handling assemblies. The pan head design with Phillips drive ensures easy installation while the coarse UNC threading offers quick engagement and vibration resistance in machinery, automotive components, and electronic enclosures requiring secure, sealed fastening solutions.

Specification Summary & Compliance

This screw features precise 4-40 UNC coarse threads with Class 2A thread fit for consistent engagement and dimensional accuracy. Manufacturing adheres to standard inch system specifications with a length of 1/2", head diameter of 0.238", and maximum hole diameter compatibility of 0.127". The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and regulatory acceptance for industrial use worldwide.