A mounting system for fuel injection systems connects a fuel injection valve to a fluid-conveying component and includes a connector piece of the metering valve being inserted at least partly into a receiving space of a connector body of the component; a support part disposed on the connector piece; a decoupling element; a dished disk inserted into a receiving space of the connector body and immobilized along a longitudinal axis of the receiving space relative to the connector body. The support part has a spherical support surface that faces toward a dished surface of the dished disk. The decoupling element is disposed between the spherical support surface of the support part and the dished disk. The connector piece is mounted on the connector body via the support part, decoupling element, and dished disk.