M8-1.25 x 30mm DIN 6921S Zinc Finish Class 8.8 Steel Hex Serrated Flange Bolt

Engineered for high-stress applications and vibration resistance, the M8-1.25 x 30mm DIN 6921S Hex Serrated Flange Bolt is a premium fastening solution designed for structural and mechanical integrity. Manufactured from Class 8.8 medium carbon steel, this bolt offers a robust balance of tensile strength and durability, making it ideal for automotive, industrial, and construction projects. The standout feature of this fastener is the integrated serrated flange. This design eliminates the need for a separate flat or lock washer by distributing clamping pressure over a wider surface area. The specialized serrations on the underside of the flange bite into the mating material, creating a powerful locking action that resists loosening caused by heavy vibrations or thermal cycling. This not only ensures a more secure joint but also streamlines assembly time and reduces hardware costs. Meeting rigorous DIN 6921S standards, this bolt features a 30mm length and a precision-cut 1.25mm thread pitch for a consistent, reliable fit. The clear zinc finish provides an essential layer of corrosion protection, safeguarding the steel against moisture and oxidation in indoor or protected outdoor environments. Whether you are securing engine components, machinery frames, or heavy-duty brackets, SKU 11127103 delivers the professional-grade performance and "set-it-and-forget-it" security your project demands.