Device for sealingly coupling tubular elements to junction boxes for electrical components

The device for sealingly coupling tubular elements to junction boxes for electrical components comprises a connecting element (1) which defines a stem (2) which is internally provided with a through channel (3) and defines an external thread (4) engageable with a threaded seat (5,6) provided on a wall (7) of a junction box (8) for electrical components. The stem (2) is associated, at least at one end, with a head (10) accessible from the outside of the junction box (8), and has rigidly associated therewith a sealing gasket (20) engageable with the outer surface of a tube (30) and abuttable with a frustum flaring (27) which is defined at the inner end of the threaded seat (5,6) for the radial contraction of the gasket (20) on the tube (30) upon the axial compression of the gasket (20) against the flaring (27).