Lead -through device for a thin metal sheet

The device has a joint (3) made of thermoplastic elastomer and having passage orifices (2, 2`) for passage of a cable. The orifices have circular peripheral lips in contact with the cable to create a double chamber in the passage on both sides of the lips. A rigidification insert made of thermoplastic material e.g. polyamide, has a cap screw (11) for fixing and locking rotatively and axially the insert and the joint.