Injector for a fuel supply system of an internal combustion engine and fuel supply system

Injector (1) for a fuel supply system of an internal combustion engine, namely for a common-rail fuel supply system of a large diesel internal combustion engine or marine diesel internal combustion engine, comprising a nozzle body (2), a storage body (4) and a storage closure body (5), wherein the nozzle body (2) serves for fuel injection into a cylinder of the internal combustion engine, wherein the storage body (4) serves for providing an injector-specific fuel storage volume, wherein the storage closure body (5) closes the storage body (4) on a side opposite the nozzle body (2), and wherein the storage body (4) and the storage closure body (5) are materially bonded to one another.