S-91263A865 M3 x 18 mm DIN 7991 Alloy Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with 120,000 psi tensile strength for reliable performance in high-stress applications
• Superior corrosion resistance through zinc-plated alloy steel construction, extending service life in demanding environments
• Precise installation control with 2mm hex drive design preventing cam-out and ensuring secure fastening
• Optimized flush mounting featuring 90° countersink angle and standard flat head profile for seamless surface integration
• Enhanced thread engagement with fully threaded M3 coarse pitch (0.5mm) design for maximum holding power
• Guarded against material failure with Rockwell C32 hardness maintaining structural integrity under vibration and shock loads
• Regulatory compliance assurance meeting DIN 7991 specifications and international environmental standards

Professional Applications & Engineering Value

Engineered for industrial machinery assembly and precision equipment manufacturing, this Class 10.9 flat head screw addresses critical challenges in vibration-prone applications. The zinc-plated alloy steel construction provides essential corrosion protection while maintaining the high tensile strength required for structural fastening. The fully threaded metric design with coarse pitch threading ensures maximum thread engagement in both metallic and composite materials, while the 90° countersink angle enables flush mounting in precision applications where surface protrusion is unacceptable. The hex drive configuration delivers reliable torque transmission during installation, preventing damage to the fastener head and surrounding components.

Specification Summary & Compliance

This M3 x 0.5mm x 18mm flat head hex screw features Class 6g thread fit tolerance per metric standards, ensuring precise threading compatibility. Manufactured to DIN 7991 specifications with Class 10.9 strength rating, it delivers consistent mechanical performance. The fastener is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, meeting international standards for hazardous substance restrictions and chemical safety in industrial components.