S-97870A194 M4 x 12 mm Sealing Tamper-Resistant Torx Flat Head Screws

Key Features & Benefits at a Glance

• Superior Sealing Performance - Integrated Buna-N rubber O-ring creates reliable fluid and gas seals up to 1500 psi pressure
• Enhanced Security & Tamper Resistance - Special T20 Torx drive prevents unauthorized removal in sensitive applications
• Excellent Corrosion Resistance - 18-8 stainless steel construction with passivated finish withstands harsh environments
• Wide Temperature Compatibility - Buna-N O-ring maintains sealing integrity from -40° to 225°F (-40° to 107°C)
• Precision Thread Engagement - Class 6g thread fit ensures consistent, reliable fastening in metric applications
• Optimized Head Design - Undercut flat head profile provides flush mounting and improved countersink performance
• High Tensile Strength - 70,000 psi rating delivers exceptional mechanical performance in demanding applications

Professional Applications & Engineering Value

This M4 metric flat head screw with integrated Buna-N rubber O-ring addresses critical sealing challenges in industrial environments where fluid containment and pressure integrity are paramount. The 18-8 stainless steel construction, enhanced by passivated finish, provides superior corrosion resistance for applications exposed to moisture, chemicals, and outdoor elements. The tamper-resistant T20 Torx drive ensures security in public access equipment, electrical enclosures, and machinery where unauthorized tampering must be prevented. The undercut flat head design allows for flush mounting while the Class 6g thread fit guarantees precise engagement in metric threaded holes. Ideal for pressure vessels, fluid handling systems, outdoor equipment, and security applications requiring both reliable sealing and tamper resistance.

Specification Summary & Compliance

This M4 x 0.7mm pitch x 12mm length sealing screw features Class 6g thread tolerance with coarse spacing and right-hand threading. The flat head design incorporates a 90° countersink angle with 8.94 mm head diameter. Manufactured from 18-8 stainless steel with passivated surface treatment, the screw is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. The integrated Buna-N rubber O-ring provides sealing capability for maximum hole diameters of 4.546 mm.