S-92178A168 M5 x 8 mm ASTM F879M, ISO 7380 Sealing Tamper-Resistant Torx Stainless Steel Button Head Screws

Key Features & Benefits at a Glance

• Superior Sealing Performance: Integrated Buna-N rubber O-ring creates a reliable seal capable of withstanding pressures up to 1500 psi, preventing leaks in critical applications.
• Enhanced Tamper Resistance: Tamper-resistant T25 Torx drive provides added security, deterring unauthorized access or disassembly in public or high-security environments.
• Excellent Corrosion Resistance: Passivated 18-8 Stainless Steel construction ensures long-term durability and performance in harsh or corrosive industrial settings.
• High Mechanical Strength: With a tensile strength of 100,000 psi and Rockwell B96 hardness, this screw maintains integrity under high stress and vibration.
• Broad Temperature Tolerance: O-ring functions effectively across a wide temperature range from -40° to 225° F, suitable for varied operational climates.
• Precision Thread Fit: Class 6g coarse threading ensures easy installation and secure fastening in standard M5 metric holes up to 5.562 mm.
• Streamlined Head Design: Rounded button head profile offers a low-profile, aesthetically pleasing finish that reduces snagging risks.

Professional Applications & Engineering Value

This M5 metric screw is engineered to address common challenges in industrial assembly where sealing integrity and tamper resistance are paramount. The combination of passivated 18-8 stainless steel and a Buna-N rubber O-ring provides a robust solution for environments exposed to moisture, chemicals, or pressure fluctuations, such as in machinery enclosures, automotive components, and electronic housings. The tamper-resistant Torx drive (T25) ensures that fasteners remain secure in public infrastructure or sensitive equipment, reducing maintenance and vandalism risks. Its fully threaded design and coarse thread pitch facilitate quick installation while maintaining a strong hold, making it ideal for high-volume production lines where efficiency and reliability are critical.

Specification Summary & Compliance

This screw features metric M5 x 0.8 mm coarse threads with a Class 6g tolerance for precise fit, and is fully threaded for consistent engagement. It complies with ASTM F879M and ISO 7380 specifications, ensuring adherence to international manufacturing standards. Additionally, it is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, confirming its safety and environmental responsibility for global industrial use.