S-91900A854 M5 x 8 mm ASTM F879M, ISO 7380 Tamper-Resistant Torx Stainless Steel Button Head Screws

Key Features & Benefits at a Glance

• Enhanced tamper resistance with specialized Torx drive requiring T25 tools, preventing unauthorized access in public or high-security installations.
• Superior corrosion resistance due to 18-8 Stainless Steel construction and passivated finish, ideal for harsh environments and long-term outdoor use.
• High mechanical strength with 80,000 psi tensile strength and Rockwell B96 hardness, ensuring reliable performance under stress and vibration.
• Secure and flush mounting from the low-profile button head design, reducing snagging while maintaining a clean, professional appearance.
• Precise and durable threading with fully threaded M5x0.8 mm coarse pitch and Class 6g fit, enabling quick assembly and strong hold in various materials.
• Broad industry compliance meeting ASTM F879M and ISO 7380 standards, ensuring interchangeability and quality for global engineering projects.
• Environmental and safety assurance through RoHS 3 and REACH compliance, supporting sustainable and safe manufacturing practices.

Professional Applications & Engineering Value

Engineered for high-security and demanding industrial environments, these M5 tamper-resistant Torx button head screws provide a robust fastening solution where vandalism, tampering, or unauthorized disassembly are concerns. The 18-8 stainless steel material combined with a passivated finish offers exceptional resistance to rust and chemicals, making them suitable for outdoor equipment, electronic enclosures, and machinery in humid or corrosive settings. The T25 drive style ensures that only authorized personnel with specific tools can install or remove the screw, enhancing asset protection. With a coarse thread pitch and fully threaded shank, these screws deliver rapid installation and reliable grip in metals and plastics, reducing assembly time while maintaining structural integrity under dynamic loads.

Specification Summary & Compliance

This screw features an M5x0.8 mm coarse thread with Class 6g tolerance, ensuring precise fit and consistent performance in metric applications. Manufacturing and quality adhere to ASTM F879M and ISO 7380 specifications, guaranteeing dimensional accuracy and mechanical properties. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming it is free of hazardous substances and safe for use in regulated industries.