Fuel injector, fuel injection assembly and use of a sealing ring

The present disclosure relates to a fuel injector (1) comprising an injector body (10) having a fuel inlet portion (100) at one of its ends and a sealing ring (30) extending circumferentially around the fuel inlet portion (100), wherein the sealing ring (30) has a non-circular cross-sectional shape. The present disclosure also relates to a fuel injection assembly and to the use of a sealing ring (30).