Cable connection sleeve apparatus for connecting, in a sealing manner, an incoming and an outgoing cable (12.1, 12.2), in particular for heating cables (12.1, 12.2) and in particular suitable for areas in which there is a risk of explosion, comprising - a main body with a continuous main body recess, - in each case one thrust nut which is connected in the end regions of the main body, and - sealing ring units (34, 36) which protect the connection region of the cables (12.1, 12.2) against external influences, wherein - the sealing ring units (34, 36) are permanently under the pressing action of compression springs (40, 42) when the thrust nut is connected to the main body, - there is a longitudinally displaceable pressure piece with a through-going recess for the cable (12.1, 12.2) within each thrust nut, - there is a sealing ring unit which adjoins the inside of the pressure piece and is annular in the transverse direction and surrounds the outer circumferential surface of the cable (12.1, 12.2) in a sealing manner and otherwise bears directly or indirectly against the inner wall of the thrust nut and the main body in a sealing manner, and - a first compression spring acts between the thrust nut and the pressure piece, - characterized in that - there is a clamping unit with a continuous stepped recess with an end stop, which clamping unit is inserted in regions into the main body and within which the pressure piece is arranged in regions and is present in a longitudinally displaceable manner, wherein the inner wall with the end stop of the clamping unit, the front end side of the pressure piece and the outer wall of an inserted cable (12.1, 12.2) form a chamber within which the sealing ring unit is present under the action of the first compression spring in a manner sealed on all sides, - a sealing ring unit is arranged in a sealing manner between the outer wall of the clamping unit and the inner wall of the thrust nut, which sealing ring unit bears, by way of its front end side, against the end side of the main body and has pressure applied to its opposite end side by means of a second compression spring, which is supported against the inner wall of the thrust nut, when the thrust nut is connected to the main body, - a closure ring unit is arranged on each end side of the sealing ring unit, and - a flange which faces outwards is connected to/integrally formed at that end region of the pressure piece which faces inwards. - a main body with a continuous main body recess, - in each case one thrust nut which is connected in the end regions of the main body, and - sealing ring units (34, 36) which protect the connection region of the cables (12.1, 12.2) against external influences, wherein - the sealing ring units (34, 36) are permanently under the pressing action of compression springs (40, 42) when the thrust nut is connected to the main body, - there is a longitudinally displaceable pressure piece with a through-going recess for the cable (12.1, 12.2) within each thrust nut, - there is a sealing ring unit which adjoins the inside of the pressure piece and is annular in the transverse direction and surrounds the outer circumferential surface of the cable (12.1, 12.2) in a sealing manner and otherwise bears directly or indirectly against the inner wall of the thrust nut and the main body in a sealing manner, and - a first compression spring acts between the thrust nut and the pressure piece, - characterized in that - there is a clamping unit with a continuous stepped recess with an end stop, which clamping unit is inserted in regions into the main body and within which the pressure piece is arranged in regions and is present in a longitudinally displaceable manner, wherein the inner wall with the end stop of the clamping unit, the front end side of the pressure piece and the outer wall of an inserted cable (12.1, 12.2) form a chamber within which the sealing ring unit is present under the action of the first compression spring in a manner sealed on all sides, - a sealing ring unit is arranged in a sealing manner between the outer wall of the clamping unit and the inner wall of the thrust nut, which sealing ring unit bears, by way of its front end side, against the end side of the main body and has pressure applied to its opposite end side by means of a second compression spring, which is supported against the inner wall of the thrust nut, when the thrust nut is connected to the main body, - a closure ring unit is arranged on each end side of the sealing ring unit, and - a flange which faces outwards is connected to/integrally formed at that end region of the pressure piece which faces inwards.