kingpin 16 of the semi trailer 15 also being possible the body 27 takes the form of a mechanical base composed for example of a frame structure or of exterior and interior longitudinal 29 and transversal 30 plates the body 27 is advantageously grippable by a handling machine 24 for this it has a mechanical interface system 31 compatible with the gripping system of this machine in the illustrated variant it is for example a series of apertures 32 arranged in alignment within the longitudinal 29 and or transversal 30 plates of the body 27 so as to leave the interior space free for the insertion of the fork s 26 of the forklift truck 25 depending on the variant and the layout of these openings 32 the apertures can be transversal or longitudinal or both at the same time as can be seen in the example in fig5 in the latter case the forklift truck 25 can advantageously take up the hitch attachment 9 via any of its faces and employ it according to wishes for transversal or longitudinal presentation however other handling machines 24 can be used such as a port crane or other lifting appliance of crane or beam type for example the mechanical interface system 31 can be different according to the type of handling machinery used for a crane for example the openings 32 providing apertures for the arms of the fork 26 of the forklift truck 25 can be replaced for example by attachment rings for slings different mechanical interface systems 31 can advantageously coexist on the body 27 of the hitch attachment 9 to make it compatible with various types of handling plant as previously mentioned the body 27 of the hitch attachment 9 also comprises an immobilization system 11 complementary to.