A hydraulic connection via which a fuel injector is connectable to a fuel-conducting component and which includes a retaining bridge having a support surface. A connecting piece of a fuel injector is supportable on the support surface of the retaining bridge. A hydraulic connection being formed between the connecting piece of the fuel injector and a connection. A convexly curved bearing surface is provided on the connection, and a support surface is formed on the connecting piece of the fuel injector. A contact between the connecting piece of the fuel injector and the connection is implemented on the convexly curved bearing surface and the support surface for forming the hydraulic connection. The support surface is designed axially symmetrically with respect to a longitudinal axis. The support surface is designed in a widened manner in a direction from the connecting piece toward the connection along the longitudinal axis.