Abstract: The invention concerns a coaxial connector plug and mating plug in which the connector plug has a connector housing that is open at the front end for plugging in the mating plug and contains a canal holding an insulated internal conductor contact, with a clamp sleeve and a sliding sleeve that can be moved axially to mechanically connect the connector housing with the mating plug, wherein the sliding sleeve surrounds the clamp sleeve in the operating position and exerts on it a force directed radially inward in the operating position, and wherein the clamp sleeve can be made to rest against the mating plug at a clamp surface, and wherein an outer conductor contact surface of the mating plug can be clamped axially against an outer conductor contact surface of the connector plug.