856A3586G02 is a precision aerospace component, compliant with AS9100D quality standards and FAA/EASA regulations, designed for the hydraulic systems of large commercial aircraft.

It functions as a hydraulic system pressure regulator seal ring, creating a reliable, airtight seal between the pressure regulator and its mounting seat. This prevents hydraulic fluid leakage and maintains stable pressure adjustment, which is essential for the normal operation of aircraft hydraulic components including flight controls, landing gear, and brake systems, avoiding pressure fluctuations that would cause component malfunction or flight safety risks.

Made from oil-resistant, high-temperature fluorosilicone rubber, it can withstand temperatures from -40°C to 235°C and long-term contact with aviation hydraulic fluids. Weighing 0.08kg, it enables fast replacement during MRO, and is a key component for hydraulic system stability.