S-90386A108 M8 x 20 mm DIN 6921 Medium-Strength Metric Class 8.8 Steel Serrated-Flange Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 110,000 psi ensures reliable performance in high-stress applications, preventing fastener failure
• Enhanced corrosion resistance from zinc plating protects against rust and extends service life in demanding environments
• Secure anti-loosening performance with serrated flange design that bites into surfaces, eliminating the need for separate washers
• Optimized torque transmission through external hex drive design allows for easy installation with standard tools
• Precision thread engagement with Class 6g tolerance and M8x1.25 coarse thread ensures consistent, reliable fastening
• Superior material strength with Class 8.8 grade and Rockwell C22 hardness provides excellent durability and load-bearing capacity
• Full thread coverage along the 20mm length offers maximum grip and adjustment flexibility in various material thicknesses

Professional Applications & Engineering Value

These M8 hex flange screws deliver exceptional engineering value across demanding industrial sectors. The zinc-plated steel construction provides critical corrosion protection for automotive underbody components and outdoor machinery exposed to harsh elements. The integrated serrated flange eliminates vibration-induced loosening in equipment and machinery, while the Class 8.8 strength rating ensures structural integrity in construction frameworks and heavy-duty assemblies. The coarse metric thread (M8x1.25) facilitates quick installation in production environments and provides superior holding power in various materials. With fully threaded design and external hex drive, these fasteners offer versatile application solutions while reducing inventory complexity for maintenance teams.

Specification Summary & Compliance

This M8 x 1.25 x 20mm hex flange screw features precision Class 6g thread fit tolerance and complies with DIN 6921 manufacturing standards. The fastener meets Class 8.8 strength grade requirements with verified mechanical properties including Rockwell C22 hardness and 110,000 psi tensile strength. Regulatory compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, ensuring safe use across European and international markets. The combination of 18mm flange diameter and fully threaded design provides consistent performance in industrial fastening applications.