S-90386A100 M6 x 12 mm DIN 6921 Medium-Strength Metric Class 8.8 Steel Serrated-Flange Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional Tensile Strength: With a tensile strength of 110,000 psi, this screw provides reliable, heavy-duty fastening for demanding industrial applications, reducing the risk of failure under high stress.
• Superior Corrosion Resistance: The zinc-plated steel construction offers excellent protection against rust and corrosion, extending the service life of your assemblies in harsh environments.
• High-Strength Class 8.8 Grade: This metric screw meets Class 8.8 strength standards, ensuring consistent performance and durability for critical mechanical joints.
• Integrated Flange Design: The built-in flange with a diameter of 14.2 mm provides a larger bearing surface, distributing load more effectively and eliminating the need for a separate washer.
• Secure Locking with Serrations: The serrated underside of the head bites into the mating surface, preventing loosening from vibration and ensuring a stable, long-lasting connection.
• Precision Coarse Threading: The M6 x 1 mm coarse thread with a Class 6g fit allows for quick and easy installation while maintaining a secure, high-strength hold.
• Standardized Compliance: Manufactured to DIN 6921 specifications, this screw guarantees dimensional accuracy and interchangeability, streamlining your procurement and assembly processes.

Professional Applications & Engineering Value

Engineered for robustness, this M6 hex head screw is a cornerstone for industrial machinery, automotive sub-assemblies, and structural steelwork where vibration resistance and high clamp load are paramount. The zinc-plated steel material provides a critical barrier against corrosion, significantly reducing maintenance cycles in humid or outdoor settings. The combination of a Class 8.8 strength grade and a fully threaded design ensures that the fastener develops its full tensile strength along the entire engagement length, preventing joint slippage. The external hex drive and coarse thread pitch enable rapid installation with standard tools, reducing assembly time and labor costs. Its flanged head design is particularly valuable in sheet metal or plastic applications, as it prevents pull-through and provides a more secure, washer-like function without adding separate components.

Specification Summary & Compliance

This fastener features an M6 x 1 mm metric coarse thread with a Class 6g tolerance for a reliable fit. It is manufactured in compliance with the DIN 6921 standard, ensuring precise dimensional control for the hex head, flange, and thread form. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, confirming it is free from hazardous substances and safe for use in various markets.