There is described a device for connecting a first mechanical waveguide and a second mechanical waveguide, including a first body for receiving the first waveguide, and a second body for receiving the second waveguide. The second body includes a tubular member having a first thread extending on an internal surface thereof, a first tubular screw having a second thread on an external surface corresponding to the first thread, and a third thread extending on an internal surface, with a pitch of the second thread being greater than a pitch of the third thread. The second body also includes a second tubular screw having a fourth thread extending on an external surface corresponding to the third thread with the second tubular screw being threadingly and frictionally engaged with the first tubular screw, a triggering member for rotating the first tubular screw, and an indexer for limiting a rotation of the second tubular screw to at least an initial angular position.