S-90825A150 4-40 x 3/4" Sealing Stainless Steel Pan Head Phillips Screws

Key Features & Benefits at a Glance

• Superior sealing performance with Buna-N rubber O-ring that withstands pressures up to 6000 psi, preventing leaks in critical applications
• Excellent corrosion resistance thanks to 18-8 stainless steel construction and passivated finish, ensuring long-term reliability in harsh environments
• Wide temperature tolerance from -40° to 225°F, maintaining sealing integrity across diverse operating conditions
• Secure fastening with Class 2A thread fit providing consistent engagement and reliable holding power in UNC coarse threads
• Easy installation and removal with Phillips No. 1 drive and rounded pan head design, reducing assembly time
• Full threading along the 3/4" length enables maximum thread engagement and uniform stress distribution
• Compliance with environmental regulations including RoHS 3 and REACH, meeting international standards for industrial components

Professional Applications & Engineering Value

This 4-40 UNC rounded head Phillips screw delivers exceptional engineering value in demanding sealing applications where fluid containment is critical. The combination of 18-8 stainless steel with passivated finish provides superior corrosion resistance, while the integrated Buna-N rubber O-ring creates a reliable seal against liquids and gases. The fully threaded design ensures maximum engagement in threaded holes, distributing clamping force evenly to prevent joint failure. Engineers specify this sealing screw for hydraulic systems, pneumatic equipment, and industrial machinery where pressure ratings up to 6000 psi and temperature extremes from -40° to 225°F are common operational challenges. The coarse UNC thread with Class 2A fit provides quick assembly while maintaining precision alignment in manufacturing and maintenance applications.

Specification Summary & Compliance

This sealing screw features precision 4-40 UNC coarse threads with Class 2A thread fit for consistent engagement and reliable performance. The fully threaded 3/4" length provides maximum fastening capability with a rounded pan head and Phillips No. 1 drive for efficient installation. Manufactured from 18-8 stainless steel with passivated finish for enhanced corrosion protection. The integrated Buna-N rubber O-ring enables effective sealing in applications requiring up to 6000 psi pressure resistance. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards for industrial component manufacturing.