S-91870A364 M3.5 x 12 mm ASTM F879M Tamper-Resistant Torx Stainless Steel Flat Head Screws

Key Features & Benefits at a Glance

• Enhanced tamper resistance with specialized Torx T15 drive prevents unauthorized access in security-sensitive environments
• Superior corrosion protection through 18-8 stainless steel construction and passivated finish ensures long-term reliability in harsh conditions
• High mechanical strength with 80,000 psi tensile strength and Rockwell B96 hardness withstands demanding industrial applications
• Precision thread engagement with Class 6g fit and coarse 0.6 mm pitch provides secure fastening and vibration resistance
• Full threading capability along the entire 12 mm length ensures maximum grip and load distribution
• Regulatory compliance with ASTM F879M, RoHS 3, and REACH standards guarantees product safety and environmental responsibility
• Optimized flush mounting with standard 90° countersink angle and flat head design creates smooth, unobtrusive surfaces

Professional Applications & Engineering Value

These M3.5 flat head screws with tamper-resistant Torx T15 drive address critical security and durability challenges in industrial settings. The 18-8 stainless steel composition combined with passivated finish provides exceptional resistance to corrosion, oxidation, and chemical exposure, making them ideal for outdoor equipment, marine applications, and harsh manufacturing environments. The metric coarse thread with Class 6g precision ensures reliable installation in various materials while preventing loosening under vibration. As security fasteners, they protect against unauthorized access in public infrastructure, electrical enclosures, and transportation systems. The fully threaded design maximizes holding power in thin materials and complex assemblies, while the standardized flat head profile maintains aesthetic integrity in finished products.

Specification Summary & Compliance

This metric flat head screw features M3.5 x 0.6 mm coarse threads with Class 6g thread fit per ISO standards, ensuring precise dimensional accuracy and compatibility. Manufacturing specifications comply with ASTM F879M for consistent quality and performance. The product maintains full compliance with RoHS 3 (2015/863/EU) restrictions on hazardous substances and REACH (EC 1907/2006) regulations for chemical safety. The 12 mm length provides standardized metric sizing for universal application across industrial and commercial projects requiring secure, corrosion-resistant fastening solutions.