A high-current coaxial connection with two plug elements that can be connected with one another, in particular to connect a current-carrying coaxial conductor to a gradient coil of a magnetic resonance apparatus, has a first and second coupling rings provided at the respective plug elements. The first coupling ring with a first thread is screwed onto one plug contact to be fixed to the plug element while the second coupling ring with a second thread that overlaps the first coupling ring, is screwed onto a mating thread section at the other plug element. Both coupling rings are rotationally locked relative to one another and the first thread and the second thread are different.