Fastening device

A fastening device comprising:

• a tube intended to be pressurized, the tube comprising at least two flats and a threaded portion;
• an element mounted on an end of the tube;
• a base supporting the element and intended to be attached to the end of the tube;
• the base comprising at least two anchoring points;
• at least two elongated elements, each elongated element comprising a first end configured to cooperate with a respective anchoring point of the at least two anchoring points of the base;
• a disc on which a second end of each elongated element is fastened;
• and
• a nut having a thread matching a thread of the threaded portion of the tube, the disc having an inner opening with a diameter larger than an outer diameter of the tube and smaller than an outer radial dimension of the nut such that the element is attachable at the end of the tube with the disc arranged around the threaded portion of the tube, so that the at least two elongated elements extend into the at least two flats of the tube, such that screwing the nut onto the threaded portion of the tube moves the disc away from the end of the tube while tensioning the at least two elongated elements, and such that a tension of the base at the end of the tube withstands a pressurization of the tube.