856A3750G01 is a precision aerospace component, compliant with AS9100D quality standards and FAA/EASA regulations, developed for the fuel systems of CFM56 series aircraft engines.

It serves as a fuel distribution manifold seal ring, forming a tight, fuel-resistant seal between the manifold segments and the fuel injection interfaces. This seal prevents aviation fuel leakage in the fuel distribution process, ensuring the accurate delivery of fuel to each combustion chamber, maintaining the engine's stable combustion, and avoiding power fluctuations, increased fuel consumption, or flameout risks during flight.

Made from high-temperature, fuel-resistant fluorocarbon rubber, it works stably at -55°C to 290°C, and resists long-term corrosion from aviation fuel. Weighing 0.05kg, it supports quick MRO replacement, a critical component for engine fuel system reliability.