S-90825A210 1/4"-20 x 1/2" Sealing Stainless Steel Pan Head Phillips Screws

Key Features & Benefits at a Glance

• Superior sealing performance with integrated Buna-N rubber O-ring that withstands pressures up to 6000 psi, preventing leaks in demanding applications
• Excellent corrosion resistance thanks to 18-8 stainless steel construction and passivated finish, ensuring long-term reliability in harsh environments
• Precise thread engagement with Class 2A UNC coarse threading that provides consistent, reliable fastening and easy installation
• Optimized drive efficiency with Phillips No. 3 drive style that offers good torque transmission while the rounded pan head provides a low-profile appearance
• Broad temperature compatibility with O-ring material rated for -40° to 225° F, maintaining sealing integrity across various operating conditions
• Full threading design ensures maximum thread engagement along the entire 1/2" length for superior holding power
• Regulatory compliance with RoHS 3 and REACH standards, making these screws suitable for regulated industrial applications

Professional Applications & Engineering Value

This 1/4"-20 UNC rounded head Phillips screw delivers exceptional engineering value through its integrated sealing capability and robust 18-8 stainless steel construction. The combination of Buna-N rubber O-ring and passivated finish addresses critical industrial challenges by preventing fluid and gas leakage while resisting corrosion in demanding environments. Engineers specify these fasteners for hydraulic systems, pneumatic equipment, and industrial machinery where pressure sealing up to 6000 psi is required. The UNC coarse threading with Class 2A fit ensures reliable installation and vibration resistance, while the Phillips drive and rounded pan head profile facilitate efficient assembly in confined spaces. These sealing screws solve the dual challenge of providing secure fastening while maintaining environmental integrity in applications from manufacturing equipment to fluid handling systems.

Specification Summary & Compliance

This sealing fastener features precision 1/4"-20 UNC coarse threading with Class 2A thread fit for consistent dimensional accuracy. The screw is manufactured from 18-8 stainless steel with a passivated finish for enhanced corrosion protection. The integrated Buna-N rubber O-ring provides reliable sealing performance across a temperature range of -40° to 225° F. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental responsibility and suitability for regulated industrial applications worldwide.