S-90386A120 M12 x 40 mm DIN 6921 Medium-Strength Metric Class 8.8 Steel Serrated-Flange Hex Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance through zinc-plated steel construction for extended service life in harsh environments
• Exceptional holding power with Class 8.8 strength rating and 110,000 psi tensile strength for demanding applications
• Enhanced vibration resistance with serrated locking flange that prevents loosening under dynamic loads
• Quick and secure installation using standard external hex drive tools for efficient assembly operations
• Reliable thread engagement with fully threaded M12x1.75mm coarse thread design for faster installation
• Precise dimensional accuracy meeting Class 6g thread fit standards for consistent performance
• Environmental compliance assurance with RoHS 3 and REACH standards for responsible manufacturing

Professional Applications & Engineering Value

Engineered for industrial machinery, structural assemblies, and heavy equipment applications, these M12 hex head screws deliver critical performance where vibration resistance and structural integrity matter most. The zinc-plated steel construction provides essential corrosion protection in manufacturing environments, while the serrated flange eliminates the need for separate washers and creates positive locking action that maintains clamp load under continuous vibration. The Class 8.8 strength rating ensures reliable performance in high-stress applications, making these metric hex bolts ideal for assembly lines, construction equipment, and automotive applications where fastener failure is not an option. The combination of fully threaded design and coarse thread pitch allows for rapid installation and maximum thread engagement in various materials.

Specification Summary & Compliance

This flange screw features precise Class 6g thread fit tolerance according to metric standards, with M12x1.75mm coarse thread configuration and 40mm length. Manufactured to DIN 6921 specifications with external hex drive and 26.6mm flange diameter, these industrial fasteners demonstrate full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards. The Rockwell C22 hardness rating ensures durability while maintaining proper tensile strength characteristics for heavy-duty fastening applications.