Abstract: A fitting for mounting to the ends of smooth wall tubes, the fitting having an entry for the tube and a collet which grips on the outside diameter of the tube by means of a mechanical spring. The fitting also seals on the inside diameter of the tube. A passageway extends through the fitting such that the tube is in fluid communication with a supply source, the fluid being able to flow between the supply source and the tube. The fluid pressure activates a piston in the fitting which causes the collet to engage the tube more securely and also increases the seal within the inside diameter of the tube.

Abstract: This invention relates to a fitting for mounting to the ends of smooth wall tubes, particularly smooth wall tubes having a bead on the ends thereof. The fitting both grips and seals the inside diameter of the tube, with positive adjustable handle torque action.

Abstract: This invention relates to a fitting for mounting to the ends of smooth wall tubes. The fitting grips on the outside diameter of the tube, and also seals on its inside diameter, with positive adjustable handle torque action. The counter forces of ID sealing and OD gripping at the same point eliminate the possibility of tube distortion especially on minimum wall tubing even at elevated pressures.