S-95635A673 M4 x 12 mm ASTM F879M Tamper-Resistant Hex-Drive Stainless Steel Button Head Screws

Key Features & Benefits at a Glance

• Enhanced tamper resistance with specialized hex drive requiring matching security tools, preventing unauthorized access in public or high-security installations
• Superior corrosion protection through 18-8 stainless steel construction with passivated surface treatment, ensuring longevity in humid or chemically aggressive environments
• High mechanical reliability with 80,000 psi tensile strength and Rockwell B96 hardness, maintaining structural integrity under vibration and heavy loads
• Precision thread engagement through Class 6g tolerance coarse threading, enabling faster installation and reduced cross-threading risks in industrial assembly
• Optimized head design combining rounded button profile with standard dimensions (7.59mm diameter), providing flush mounting without compromising drive security
• Full regulatory compliance meeting ASTM F879M specifications alongside RoHS 3 and REACH environmental standards for global industrial applications
• Complete thread coverage along the 12mm shaft length, ensuring maximum grip strength and uniform stress distribution in fastened components

Professional Applications & Engineering Value

Engineered for critical security and durability requirements, these M4 metric screws solve two primary industrial challenges: tampering vulnerability and environmental degradation. The tamper-resistant hex drive deters unauthorized disassembly in public infrastructure, transportation systems, and access panels, while the 18-8 stainless steel material with passivated finish resists chemical exposure and atmospheric corrosion in manufacturing facilities or outdoor installations. The coarse thread pitch (0.7mm) ensures rapid engagement in soft materials and plastic housings, reducing assembly time without sacrificing the Class 6g thread fit precision required for vibration-resistant connections. These fully threaded security screws deliver consistent clamping force across electronic enclosures, machinery guards, and architectural fixtures where maintenance access must be controlled.

Specification Summary & Compliance

Manufactured to metric system standards with M4 x 0.7mm coarse threads maintaining Class 6g tolerance for consistent fit. Mechanical properties include 80,000 psi tensile strength and Rockwell B96 hardness verified per ASTM F879M specifications. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations ensures suitability for international industrial supply chains.