S-98070A560 1/4"-20 x 1/2" Sealing Stainless Steel Phillips Flat Head Screws

Key Features & Benefits at a Glance

• Superior sealing performance with silicone rubber O-ring that withstands pressures up to 6000 psi and extreme temperatures from -80° to 400°F
• Enhanced corrosion resistance thanks to 18-8 stainless steel construction with passivated finish for extended service life in harsh environments
• Reliable thread engagement with Class 2A fit UNC coarse threads ensuring consistent fastening in industrial applications
• Flush mounting capability through undercut flat head design that sits perfectly countersunk in 100° angle holes
• High tensile strength of 70,000 psi provides exceptional load-bearing capacity for demanding mechanical assemblies
• Secure drive engagement with Phillips No. 3 drive style offering positive torque transmission during installation
• Environmental compliance with RoHS 3 and REACH regulations for safe use across global industrial markets

Professional Applications & Engineering Value

This 1/4"-20 UNC flat head Phillips screw delivers critical sealing performance where fluid or pressure containment is essential. The combination of 18-8 stainless steel with passivated finish provides superior corrosion resistance for applications exposed to moisture, chemicals, or outdoor elements. The silicone rubber O-ring technology creates a reliable seal in hydraulic systems, pneumatic equipment, and fluid handling assemblies, eliminating the need for additional sealing components. The undercut flat head profile ensures proper seating in countersunk holes while the fully threaded design maintains consistent clamping force. Ideal for industrial machinery, processing equipment, and automotive systems where pressure integrity and corrosion resistance are paramount.

Specification Summary & Compliance

This sealing screw features precision UNC coarse threads with Class 2A fit tolerance for reliable engagement in standard tapped holes. Manufactured to industry standards with 1/4"-20 thread size and 1/2" length, it accommodates maximum hole diameter of 0.265". 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 distribution and use.