Abstract: A connector for connecting corrugated tubing to pipes or fittings permits the corrugated tubing to be used without any modification to its ends. The corrugated tubing need only be cut to length by severing at a "valley" of one of the corrugations. A ferrule in the form of semi-annular half-sections is fitted about the endmost corrugations of the severed tubing. Inwardly extending projections of the ferrule engage at least one of the valleys to prevent relative axial movement between the ferrule and the tubing. A retainer nut previously placed over the tubing is slipped over the ferrule to retain the ferrule in place. An outwardly extending portion of the ferrule engages an inner portion of the nut to prevent axial movement of the nut over the ferrule. An O-ring or other sealing member may be inserted within the retainer nut and positioned against the endmost corrugation of the tubing.