S-91870A390 M3 x 8 mm ASTM F879M Tamper-Resistant Torx Stainless Steel Flat Head Screws

Key Features & Benefits at a Glance

• Enhanced Security: Tamper-resistant T10 Torx drive prevents unauthorized removal, ideal for public or high-security installations.
• Superior Corrosion Resistance: 18-8 Stainless Steel construction with passivated finish ensures long-term durability in harsh or outdoor environments.
• High Mechanical Strength: 80,000 psi tensile strength and Rockwell B96 hardness provide reliable performance under significant stress and vibration.
• Precision Threading: Class 6g thread fit and coarse M3 x 0.5mm thread ensure easy, secure installation and excellent grip in various materials.
• Flush, Professional Finish: Standard flat head with 90° countersink sits flush with surfaces, preventing snagging and offering a clean aesthetic.
• Broad Regulatory Compliance: Meets ASTM F879M, RoHS 3, and REACH standards, ensuring safety and environmental responsibility for global projects.
• Versatile Fastening Solution: Fully threaded 8mm length and metric design make it suitable for a wide range of industrial assembly and maintenance tasks.

Professional Applications & Engineering Value

This M3 flat head screw is engineered to address critical challenges in industrial and security-focused applications. The 18-8 stainless steel material, combined with a passivated finish, provides exceptional resistance to corrosion and oxidation, making it ideal for use in electronics, outdoor equipment, and machinery exposed to moisture or chemicals. The tamper-resistant Torx (T10) drive is a key feature for preventing vandalism and unauthorized access in public infrastructure, security panels, and consumer electronics. Its coarse thread (M3 x 0.5mm) and Class 6g thread fit ensure quick, secure fastening with reduced risk of cross-threading, while the flat head design allows for a smooth, flush finish that minimizes protrusion and improves safety. These attributes make it a reliable choice for engineers and procurement specialists seeking durable, secure, and compliant metric fasteners for demanding environments.

Specification Summary & Compliance

This screw features a metric M3 x 0.5mm coarse thread with a Class 6g thread fit for precise dimensional accuracy. It is manufactured in compliance with ASTM F879M specifications, ensuring consistent quality and performance. The product is also RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting stringent environmental and safety regulations for hazardous substances.