856A3603G02 is a precision aerospace component, compliant with AS9100D quality standards and FAA/EASA regulations, designed for aircraft engine lubrication systems.It serves as a lubricating oil filter seal ring, forming an airtight, leak-proof seal between the oil filter and filter base during MRO assembly. It effectively blocks oil leakage, ensuring stable oil supply to engine moving parts, preventing insufficient lubrication that causes wear, overheating and component damage, which safeguards engine operation safety in flight.Made of high-temperature and oil-resistant fluororubber, it resists lubricant erosion and aging, working stably at -50℃ to 280℃. Weighing 0.06kg, it features excellent elasticity and sealing performance, enabling quick replacement. It is a critical component for engine lubrication system integrity and reliable aircraft operation.