Abstract: Two components are telescopically connected to one another. One component has a radial bore provided with a thread and the other component has a groove which drops away axially. A grub screw is screwed into the bore and the conical tip of the grub screw comes into engagement with the at least one of flanks that form the groove in order to either fix the two components relative to one another or to clamp them axially. In one embodiment, the screw is offset from the base of the groove such that the conical tip rolls against one of the flanks to displace to same and effect telescoping movement between the two components.