This small O-ring is supplied as a replacement sealing element for needle sockets and carburettor needle valve assemblies used on model engines. It is intended to prevent fuel leakage at the needle socket joint and maintain correct fuel delivery.
The ring is made from a nitrile elastomer to provide the flexible sealing surface needed around a needle valve socket. That seal keeps fuel containment stable so needle adjustments remain reliable during tuning and maintenance.
Fitting is simple: extract the carburettor needle assembly, inspect and clear the socket groove, insert the O-ring into the groove and reassemble the needle socket while checking for smooth needle movement and absence of fuel seepage. No specialist equipment is required.
As a spare part, it is handy for enthusiasts who service glow or small petrol engines and want consistent carburettor needle valve sealing during setup and running sessions.
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