HU55143-6 is a precision-manufactured aerospace engine lubrication system oil supply tube seal, compliant with AS9100D quality standards and FAA/EASA regulations, designed for CFM56 series turbofan engines. It seals the connection between the engine lubrication oil supply tubes and the associated components, preventing lubricating oil leakage, while blocking external contaminants from entering the oil supply path, which is critical for maintaining a continuous, clean oil supply to high-speed rotating engine parts, reducing wear, and avoiding component failure caused by insufficient lubrication.

Made from heat-resistant, oil-resistant fluorosilicone rubber with a reinforced stainless steel core, it withstands operating temperatures from -55°C to 200°C and oil system pressures up to 420 psi. Weighing 0.07kg with a precision-machined sealing surface, it enables fast replacement and tightness verification during lubrication system MRO overhauls. FAA Part 25 certified, it is a key component for lubrication system reliability.