A method for producing a sealing arrangement between an opening of the support, bore and a screw which comprises a head connected to a body and is provided with a threaded section for interacting with the hole of a part to be assembled with a support whose mechanical strength is lower than that of the screw. The invention is characterized in that, starting from an enlarged opening, the inventive method consists in engaging the screw into the bore in such a way that the head thereof is brought into contact with the opening, in screwing the screw into the hole of the part to be assembled in such a way that a pressure applied by the head sealingly presses the opening against the part of the under-head surface of the screw by removing a part of material of the support.