HU20679-1 is a precision-manufactured aerospace engine fuel system seal component, compliant with AS9100D quality standards and FAA/EASA regulations, designed for large commercial turbofan engines. It seals the connection position of the engine fuel pump and the fuel supply pipeline, preventing aviation fuel leakage during the fuel pressurization and delivery process, which is critical for maintaining the stability of fuel supply pressure, ensuring the continuous and accurate fuel delivery to the follow-up system, and avoiding potential fire risks caused by fuel leakage.

Made from high-strength, fuel-resistant and heat-resistant fluorosilicone composite, it withstands operating temperatures up to 205°C and long-term contact with aviation fuel. Weighing 0.043kg with a precision-machined sealing structure, it allows for fast installation and tightness verification during fuel system MRO overhauls. FAA Part 25 certified, it is a key component for engine fuel system safety.