Abstract: The invention relates to a plug device for a standard electrical or optical connection cord (10) provided at an end with a cord plug (12) having a body which includes an external mechanical latch (16). The plug device comprises a plug body (20); a plug adapter (22) having external fastening means for engaging in said plug body; a packing body (30) including packing (32) of cylindrical shape; and a link part (28) having a first end for connection with said plug body and a second end for connection with said packing body; said plug adapter having an internal profile suitable for receiving said cord plug body (12) and having fastening means for engaging the cord plug body and for holding said latch (16) of the cord plug body in its inactive position.