S-92178A164 M4 x 12 mm ASTM F879M, ISO 7380 Sealing Tamper-Resistant Torx Stainless Steel Button Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with passivated 18-8 stainless steel construction, ensuring long-term reliability in harsh environments.
• Enhanced tamper-proof security through specialized Torx T15 drive, preventing unauthorized access in public or sensitive installations.
• Reliable fluid and gas sealing up to 1500 psi, thanks to the integrated Buna-N rubber O-ring that maintains integrity across temperatures from -40° to 225° F.
• High tensile strength of 100,000 psi provides robust fastening performance, reducing the risk of mechanical failure under stress.
• Precise Class 6g thread fit ensures smooth installation and secure engagement in metric coarse-threaded applications.
• Full threading along the 12mm length allows for maximum grip and adjustability in varied material thicknesses.
• Compliance with international standards including ASTM F879M and ISO 7380, guaranteeing consistent quality and interoperability.

Professional Applications & Engineering Value

This M4 metric screw with a rounded button head and tamper-resistant Torx T15 drive is engineered to address critical challenges in industrial sealing and security. The passivated 18-8 stainless steel material offers excellent resistance to corrosion and oxidation, making it ideal for outdoor, marine, or chemical-exposed environments. Combined with the Buna-N rubber O-ring, it effectively seals against fluids and gases up to 1500 psi, preventing leaks in hydraulic systems, machinery housings, or HVAC components. The fully threaded coarse pitch design ensures quick assembly and reliable holding power, while the tamper-resistant feature deters vandalism in public infrastructure, transportation, or electronic enclosures. This screw delivers dependable performance where both sealing integrity and unauthorized access prevention are paramount.

Specification Summary & Compliance

This product adheres to precise dimensional standards with a Class 6g thread fit and coarse thread spacing of 0.7 mm pitch, ensuring compatibility with metric systems. It meets ASTM F879M and ISO 7380 specifications for consistent manufacturing quality. Additionally, it is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming the absence of hazardous substances and supporting environmental and safety standards in global supply chains.