S-90825A840 1/4"-20 x 3/8" Sealing Stainless Steel Pan Head Phillips Screws

Key Features & Benefits at a Glance

• Superior sealing performance with integrated Buna-N rubber O-ring, effectively containing fluids and gases in demanding applications
• Exceptional corrosion resistance provided by 18-8 Stainless Steel construction with passivated finish, ensuring long-term reliability in harsh environments
• High-pressure capability withstands up to 6000 psi, making it ideal for hydraulic and pneumatic systems requiring reliable sealing under extreme conditions
• Wide temperature tolerance from -30° to 250°F, maintaining sealing integrity across diverse operating environments
• Precision thread engagement with Class 2A UNC coarse threads ensuring secure fastening and easy installation in various materials
• Optimized drive performance with Phillips No. 3 drive style providing efficient torque transfer during installation
• Regulatory compliance assurance meeting RoHS 3 and REACH standards for environmentally responsible manufacturing and global market acceptance

Professional Applications & Engineering Value

This 1/4"-20 UNC rounded head sealing screw delivers critical engineering value by solving common industrial challenges where fluid containment and corrosion resistance are paramount. The combination of 18-8 Stainless Steel material with passivated finish provides superior protection against chemical exposure and environmental degradation, while the integrated Buna-N rubber O-ring creates a reliable seal that prevents leaks in pressurized systems. The fully threaded design with Class 2A thread fit ensures consistent engagement across the entire fastener length, making it ideal for industrial applications requiring precise sealing in hydraulic equipment, pneumatic controls, and fluid handling systems. The pan head profile with Phillips drive facilitates efficient installation in confined spaces where reliable sealing performance is critical to system integrity.

Specification Summary & Compliance

This sealing fastener features precision 1/4"-20 UNC coarse threads with Class 2A thread fit for consistent engagement and reliable performance. The manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental responsibility and global market acceptance. The fastener maintains dimensional accuracy with specified head diameter of 0.517" and length of 3/8", engineered for maximum hole diameter compatibility of 0.265". The combination of 18-8 Stainless Steel construction with passivated finish and Buna-N rubber O-ring provides comprehensive performance characteristics suitable for demanding industrial applications requiring both mechanical strength and sealing reliability.