S-91263A889 M6 x 18 mm DIN 7991 Alloy Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with Class 10.9 tensile strength (120,000 psi) for reliable performance in high-stress applications
• Superior corrosion resistance provided by zinc-plated alloy steel, extending service life in demanding industrial environments
• Precise installation and removal enabled by 4 mm hex drive design, ensuring secure tool engagement and reduced stripping risk
• Optimized thread engagement with Class 6g thread fit and coarse 1 mm pitch for faster assembly and vibration resistance
• Flush mounting capability through 90° countersink angle and flat head design, creating smooth surfaces in assembled components
• Full-length threading for maximum grip strength and uniform stress distribution along the entire fastener length
• Regulatory compliance assurance meeting DIN 7991 specifications, RoHS 3, and REACH standards for quality and environmental safety

Professional Applications & Engineering Value

Engineered for demanding industrial applications, these M6 flat head screws deliver critical performance where high tensile strength and reliable fastening are paramount. The zinc-plated alloy steel construction provides essential corrosion protection for machinery, equipment frames, and structural assemblies exposed to harsh operating conditions. With Class 10.9 strength rating (120,000 psi tensile strength) and Rockwell C32 hardness, these fully threaded hex drive screws maintain integrity under substantial vibrational loads and dynamic stresses. The coarse thread spacing (1 mm pitch) combined with Class 6g thread fit ensures rapid installation in production environments while preventing loosening in industrial fastening applications. The flat head profile with 90° countersink creates seamless finished surfaces, making these metric screws ideal for precision manufacturing, automotive components, and heavy equipment where both performance and aesthetics matter.

Specification Summary & Compliance

This M6 x 1 mm x 18 mm flat head hex screw features precision metric threading with Class 6g thread fit tolerance and coarse thread spacing for optimal performance. Manufactured to exacting DIN 7991 specifications, the fastener delivers consistent dimensional accuracy with 18 mm length, 12 mm head diameter, and 4 mm hex drive size. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) standards ensures environmental safety and regulatory adherence for global industrial applications.