S-91900A306 M5 x 25 mm ASTM F879M, ISO 7380 Tamper-Resistant Torx Stainless Steel Button Head Screws

Key Features & Benefits at a Glance

• Enhanced Security: Tamper-resistant Torx T25 drive deters unauthorized removal, ideal for public or high-risk environments.
• Superior Corrosion Resistance: 18-8 Stainless Steel with passivated finish provides excellent protection against rust and chemical exposure, extending service life.
• High Mechanical Strength: 80,000 psi tensile strength and Rockwell B96 hardness ensure reliable performance under heavy loads and vibration.
• Secure Fastening & Easy Installation: Fully threaded M5 x 0.8 mm coarse pitch with Class 6g fit offers quick assembly and strong holding power.
• Low-Profile, Aesthetic Design: Rounded button head style minimizes protrusion, reducing snagging risks while providing a clean finish.
• Broad Regulatory Compliance: Meets ASTM F879M and ISO 7380 standards, with RoHS 3 and REACH compliance for safe, global industrial use.
• Durability in Harsh Conditions: Stainless steel material maintains integrity in moist, corrosive, or temperature-variable settings.

Professional Applications & Engineering Value

This M5 tamper-resistant Torx rounded head screw is engineered to address critical needs in security-sensitive and demanding industrial applications. The 18-8 stainless steel construction, combined with a passivated finish, provides exceptional resistance to corrosion, making it suitable for outdoor equipment, marine hardware, and chemical processing facilities where environmental factors degrade ordinary fasteners. The tamper-resistant Torx drive (T25) prevents vandalism and unauthorized access, which is vital for public infrastructure, electronic enclosures, and machinery safety guards. Its fully threaded design and Class 6g thread fit ensure consistent clamping force and vibration resistance, reducing maintenance and failure risks in assembly lines, automotive components, and precision instruments. By integrating high tensile strength and compliance with international standards, this screw delivers reliable, long-term performance for engineers and procurement specialists seeking durable, secure metric fasteners.

Specification Summary & Compliance

This screw features precise M5 x 0.8 mm coarse pitch threading with a Class 6g tolerance, ensuring accurate fit and interchangeability in metric assemblies. It is manufactured in accordance with ASTM F879M and ISO 7380 specifications, guaranteeing consistent quality and dimensional accuracy. 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 various industrial and consumer applications.