S-90517A380 M8 x 25 mm ASTM F879M Tamper-Resistant Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Enhanced tamper resistance with specialized hex drive design to prevent unauthorized access in sensitive applications
• Superior corrosion resistance from 18-8 stainless steel construction with passivated finish for extended service life in harsh environments
• Reliable thread engagement through full threading and Class 6g metric coarse threads ensuring secure fastening in various materials
• High mechanical strength with 80,000 psi tensile strength and Rockwell B96 hardness for demanding industrial applications
• Optimized flat head design with 90° countersink angle providing flush mounting and clean aesthetic finish
• Regulatory compliance meeting ASTM F879M specifications and environmental standards including RoHS 3 and REACH
• Precision dimensional control with standardized metric measurements ensuring consistent performance and interchangeability

Professional Applications & Engineering Value

Engineered for security-critical applications, these M8 flat head screws with tamper-resistant hex drive provide reliable protection against vandalism and unauthorized tampering in public infrastructure, electrical enclosures, and industrial machinery. The 18-8 stainless steel material combined with passivated finish delivers exceptional corrosion resistance, making them ideal for outdoor installations, marine environments, and chemical processing facilities where moisture and corrosive elements are concerns. The fully threaded design with Class 6g metric coarse threads ensures maximum thread engagement and pull-out resistance in both metal and composite materials, while the flat head profile with standard 90° countersink allows for seamless surface integration. These industrial fasteners maintain structural integrity under vibration and thermal cycling, providing long-term reliability in engineering applications where security and durability are paramount.

Specification Summary & Compliance

This M8 x 1.25mm metric screw features precision Class 6g thread fit with coarse thread spacing, ensuring dimensional accuracy per international metric standards. The fastener meets ASTM F879M manufacturing specifications for mechanical properties and performance requirements. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations confirms the product's adherence to restricted substance directives, making it suitable for global industrial markets and environmentally conscious applications.