S-98070A580 1/4"-20 x 3/4" Sealing Stainless Steel Phillips Flat Head Screws

Key Features & Benefits at a Glance

• Superior sealing performance with integrated silicone O-ring that withstands pressures up to 6000 psi, preventing leaks in demanding industrial applications
• Exceptional corrosion resistance thanks to 18-8 stainless steel construction with passivated finish, ensuring long-term reliability in harsh environments
• Wide temperature compatibility with silicone O-ring rated from -80° to 400°F, maintaining seal integrity across extreme thermal conditions
• High tensile strength of 70,000 psi provides reliable fastening performance under significant mechanical stress
• Precision thread engagement with Class 2A UNC coarse threads ensuring consistent, secure fastening in industrial assemblies
• Optimized head design featuring undercut flat head profile for flush mounting and improved sealing surface contact
• Regulatory compliance with RoHS 3 and REACH standards, meeting international environmental and safety requirements

Professional Applications & Engineering Value

This 1/4"-20 UNC Flat Head Phillips Screw delivers exceptional engineering value in applications requiring reliable pressure sealing and corrosion resistance. The combination of 18-8 stainless steel construction with passivated finish provides superior protection against chemical exposure and environmental degradation, while the integrated silicone rubber O-ring maintains seal integrity across extreme temperature ranges from -80° to 400°F. The undercut flat head profile ensures optimal surface contact for enhanced sealing performance, making it ideal for hydraulic systems, pneumatic equipment, and industrial machinery where 6000 psi pressure resistance is critical. The fully threaded design with Class 2A thread fit guarantees consistent engagement in UNC threaded applications, providing reliable fastening in manufacturing, automotive, and processing industries where vibration resistance and leak prevention are paramount.

Specification Summary & Compliance

This sealing screw 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 safety and regulatory adherence. The 100° countersink angle and 0.265" maximum hole diameter specification provide engineering guidance for proper installation, while the fully threaded design and Phillips No. 3 drive ensure efficient assembly in industrial applications requiring high-pressure sealing capabilities.