S-91870A410 M3 x 20 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: Made from 18-8 stainless steel with a passivated finish for long-lasting performance in harsh environments.
• High Mechanical Strength: 80,000 psi tensile strength and Rockwell B96 hardness ensure reliable, vibration-resistant fastening.
• Precise Thread Engagement: Fully threaded M3 x 0.5mm coarse thread with Class 6g fit provides consistent clamping force and easy installation.
• Flush Mounting Capability: Standard flat head with 90° countersink angle allows for a smooth, unobtrusive surface finish.
• Broad Regulatory Compliance: Meets ASTM F879M, RoHS 3, and REACH standards, ensuring safety and environmental responsibility.
• Durability in Demanding Applications: Robust construction resists wear, making it suitable for repeated use in industrial settings.

Professional Applications & Engineering Value

This M3 flat head screw is engineered to address critical challenges in security and industrial applications where tampering and corrosion are major concerns. The tamper-resistant Torx drive (T10) specifically deters vandalism and unauthorized access, making it ideal for public infrastructure, electronics enclosures, and machinery requiring controlled maintenance access. Constructed from 18-8 stainless steel with a passivated finish, it offers exceptional resistance to rust and chemical exposure, prolonging service life in outdoor or humid conditions. The fully threaded design and Class 6g thread fit ensure maximum grip and uniform stress distribution, reducing the risk of loosening under dynamic loads. These features make it a reliable choice for security fasteners in transportation, telecommunications, and manufacturing equipment, where failure is not an option.

Specification Summary & Compliance

This screw features precise metric dimensions: M3 x 0.5mm thread with Class 6g tolerance for accurate fit, a length of 20 mm, and a standard flat head profile. It is manufactured in compliance with ASTM F879M specifications, ensuring consistent quality and performance. Additionally, it is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting stringent environmental and safety regulations for hazardous substances.