S-91870A464 M5 x 12 mm ASTM F879M Tamper-Resistant Torx Stainless Steel Flat Head Screws

Key Features & Benefits at a Glance

• Enhanced Security: Tamper-resistant T25 Torx drive prevents unauthorized removal, ideal for high-security applications
• Superior Corrosion Resistance: 18-8 stainless steel construction with passivated finish provides excellent protection against rust and chemical degradation
• Reliable Mechanical Performance: 80,000 psi tensile strength and Rockwell B96 hardness ensure dependable fastening under demanding conditions
• Precision Thread Engagement: Class 6g thread fit and coarse 0.8mm pitch enable quick installation and secure holding power
• Streamlined Installation: Standard flat head profile with 90° countersink angle sits flush for clean, professional finishes
• Full Thread Coverage: Completely threaded 12mm length maximizes grip strength and distribution across the entire fastener
• Regulatory Compliance: Meets ASTM F879M specifications and environmental standards including RoHS 3 and REACH

Professional Applications & Engineering Value

This M5 metric flat head screw with tamper-resistant Torx drive addresses critical security and durability challenges in industrial applications. The 18-8 stainless steel material combined with passivated finish provides exceptional resistance to corrosion, making it suitable for harsh environments including outdoor equipment, marine applications, and chemical processing facilities. The T25 security drive system prevents tampering in public access areas, transportation systems, and secured enclosures where unauthorized access must be prevented. With fully threaded design and Class 6g thread fit, engineers benefit from consistent engagement and reliable performance in assemblies requiring repeated maintenance or vibration resistance. The flat head profile ensures flush mounting in countersunk holes, maintaining surface integrity in precision machinery, electronic enclosures, and architectural fixtures.

Specification Summary & Compliance

This fastener maintains Class 6g thread tolerance according to metric standards with M5 x 0.8mm coarse threading. Manufacturing compliance meets ASTM F879M specifications for socket head cap screws. Environmental regulations adherence includes RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) compliance regarding substance restrictions. The combination of 80,000 psi tensile strength and Rockwell B96 hardness ensures mechanical reliability across industrial applications requiring security fasteners with documented material traceability.