S-91870A520 M6 x 25 mm ASTM F879M Tamper-Resistant Torx Stainless Steel Flat Head Screws

Key Features & Benefits at a Glance

• Enhanced Security: Tamper-resistant T30 Torx drive prevents unauthorized removal, ideal for public or high-security installations.
• Superior Corrosion Resistance: 18-8 stainless steel with passivated finish offers excellent durability in harsh or outdoor environments.
• Reliable Fastening Performance: Class 6g thread fit ensures consistent, secure engagement with minimal risk of cross-threading.
• High Mechanical Strength: 80,000 psi tensile strength and Rockwell B96 hardness provide robust load-bearing capacity for demanding applications.
• Optimal Flush Mounting: Standard flat head with 90° countersink angle allows for a smooth, unobtrusive surface finish.
• Broad Industrial Compliance: Meets ASTM F879M specifications and is RoHS 3 & REACH compliant for safe, regulated use.
• Full Thread Engagement: 25mm fully threaded design maximizes grip and distribution of clamping force along the entire length.

Professional Applications & Engineering Value

This M6 flat head screw is engineered to address critical needs in industrial and security-focused environments. The 18-8 stainless steel material, combined with a passivated finish, provides exceptional resistance to corrosion and oxidation, making it suitable for outdoor machinery, marine equipment, and chemical processing facilities. The tamper-resistant T30 Torx drive is a key feature for applications where vandalism or unauthorized access is a concern, such as in public infrastructure, electrical enclosures, and transportation systems. With a coarse thread pitch of 1mm and Class 6g thread fit, it ensures quick installation and reliable performance in metals and plastics, reducing assembly time and maintenance costs. Its high tensile strength and full threading offer secure, long-lasting fastening that withstands vibration and dynamic loads, providing peace of mind in critical assemblies.

Specification Summary & Compliance

This screw features a metric M6 x 1mm coarse thread with a Class 6g tolerance for precise fit, and a length of 25mm. It is manufactured in accordance with ASTM F879M specifications, ensuring consistent quality and performance. Additionally, it is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming it is free from hazardous substances and safe for various industrial and consumer applications.