S-90517A210 M4 x 8 mm ASTM F879M Tamper-Resistant Hex Drive Flat Head Screws
Tamper-Resistant Hex Drive Flat Head Screws
Image may differ from product. See technical specification for details.
Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
Key Features & Benefits at a Glance
- Tamper-resistant security with specialized hex drive design to prevent unauthorized removal in sensitive applications
- Exceptional corrosion resistance through 18-8 stainless steel construction and passivated surface treatment
- High mechanical strength with 80,000 psi tensile strength and Rockwell B96 hardness for demanding environments
- Precision threading with Class 6g fit and coarse pitch (0.7mm) for reliable engagement and vibration resistance
- Optimized flush installation featuring 90° countersink angle and standard flat head profile for smooth surface finishing
- Full-threaded design providing maximum grip length and holding power across the entire fastener
- Regulatory compliance meeting international standards for safety and environmental requirements
Professional Applications & Engineering Value
These M4 metric flat head screws with tamper-resistant hex drive address critical security and durability challenges in industrial settings. The 18-8 stainless steel material combined with passivated finish creates a robust barrier against corrosion, chemicals, and environmental exposure, making them ideal for outdoor equipment, electronic enclosures, and public infrastructure. The Class 6g thread fit ensures precise mating with tapped holes while the coarse thread pitch provides rapid installation and superior resistance to vibration loosening. The 90° countersink angle allows for flush mounting in panels and machinery where protrusions could cause safety hazards or interfere with operation. These security fasteners are particularly valuable in applications requiring both tamper-proof characteristics and reliable performance under mechanical stress.
Specification Summary & Compliance
This M4 x 0.7mm x 8mm flat head screw features Class 6g thread tolerance with fully threaded metric coarse threading and 5/32" tamper-resistant hex drive. Manufactured to meet ASTM F879M specifications for consistent quality and performance. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use in various industrial applications while maintaining 80,000 psi tensile strength and Rockwell B96 hardness.
