S-90517A280 M5 x 16 mm ASTM F879M Tamper-Resistant Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Enhanced tamper resistance with specialized hex drive requiring unique tools, preventing unauthorized access in secure environments
• Superior corrosion resistance through 18-8 stainless steel construction and passivated surface treatment for extended service life
• Reliable mechanical performance with 80,000 psi tensile strength and Rockwell B96 hardness for demanding applications
• Precise thread engagement with Class 6g fit and coarse thread spacing ensuring secure fastening in various materials
• Optimal flush mounting through standard 90° countersink angle and flat head design for smooth surface finishes
• Full-threaded design providing maximum grip length and superior holding power across the entire fastener length
• Regulatory compliance meeting international standards including ASTM F879M, RoHS 3, and REACH for global acceptance

Professional Applications & Engineering Value

These M5 metric flat head screws with tamper-resistant hex drive address critical security and durability challenges in industrial settings. The 18-8 stainless steel construction combined with passivated finish provides exceptional resistance to corrosion and chemical exposure, making them ideal for harsh environments including outdoor equipment, marine applications, and chemical processing facilities. The specialized 5/32" tamper-resistant drive prevents vandalism and unauthorized disassembly in public infrastructure, transportation systems, and secure enclosures. With fully threaded Class 6g metric coarse threads, these fasteners deliver reliable performance in metal assemblies, machinery, and electronic enclosures where vibration resistance and long-term reliability are paramount. The 90° countersink angle ensures flush mounting for safety and aesthetic requirements in finished products.

Specification Summary & Compliance

Manufactured to precise dimensional standards with Class 6g thread fit per metric threading specifications. The M5 x 0.8mm coarse thread configuration ensures optimal engagement in various materials. Compliant with ASTM F879M specification for socket head cap screws, meeting mechanical and dimensional requirements. Environmental compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring restricted substance compliance for international markets. Right-hand threading with standard flat head profile maintains compatibility with industry-standard installation tools and procedures.