Abstract: A jack plug has a contact tip provided at the free end and followed by a connection part which is received by a tubular shaft of the jack plug. The contact tip with the connection part is electrically insulated from the shaft. At the side remote of the contact tip, the shaft has a handle part through which the connecting cable runs. The connection part which is formed in one piece with the contact tip has a bore hole which penetrates it over its entire length and which extends into the interior of the contact tip. The conductor of the cable to be connected can be secured in the interior of the contact tip by a material engagement or a positive engagement (crimping). The portion of the bore hole located in the contact tip is filled wit a solder and, if required, with flux. A zone of the handle part is grooved or knurled on its inner side. This zone is narrowed in diameter by radial squeezing (crimping) after the cable to be connected is inserted.