<p>The fitting (10) has a press shell (16) plastically deformable for pressing against a support shell (14). An abutment element (30) is arranged on a press shell and includes an abutment face (34) to be abutted by a pressing tool (26) for plastically deforming the press shell. A press indication portion (40) projects from the abutment face of the abutment element. The press indication portion includes a guidance recess (44) for accommodating a guidance projection (48) of the tool for axial fixation of the press shell relative to the tool during the deformation of the press shell.</p>
