Patent ID: 8176629

Claim:
A method for screwing together two metal parts that lie against one another except in regions close to a screw connection element, where in said regions the metal parts are spaced apart from one another and are elastically deformable relative to one another, comprising the following steps: elastically deforming the region of at least one of the metal parts so that the spaced apart regions of the metal parts close to the screw connection element come close to one another; and screwing the metal parts together after said step of deforming, such that the position of the two parts relative to each other while they are being screwed together does not change, wherein the deformed region of the at least one metal part remains deformed after said step of screwing, as a result of the screw connection element, and wherein the metal parts to be screwed together are a skirt part and a crown part of a metal piston.