Exhaust gas turbo-charger arrangement, - having an exhaust gas turbo-charger comprising a compactor and a turbine, which has a turbo-charger housing, - having an actuator comprising an actuator housing for adjusting a variable turbine geometry apparatus and/or a waste gate apparatus of the turbine, - having at least one screw connection for the releasable fastening of the actuator housing to a housing flange of the turbocharger housing, wherein the at least one screw connection comprises: - a through-opening provided in the actuator housing, which is delimited by plastic material of the actuator housing, - a cutout provided in the housing flange, which is delimited on the peripheral side by an inner threading made of a metal, - a fitted bolt which has a screw body which transitions axially into a screw head, - wherein the screw body has a first axial body portion, facing away from the screw head, having an outer threading formed so as to be complementary to the inner threading of the cutout, and a second axial body portion arranged axially between the screw head and the first body portion, wherein a first body portion diameter (d 1) of the first body portion is smaller than a second body portion diameter (d 2) of the second body portion and a head diameter (d K) of the screw head is greater than the second body portion diameter (d 2), - wherein the fitted bolt passes through the through-opening of the actuator housing with the second body portion and engages with the outer threading of the first body portion into the inner threading of the cutout, such that the actuator housing is clamped between the housing flange of the turbocharger housing and the screw head of the fitted bolt, and - wherein the second body portion of the fitted bolt forms an interference fit with the plastic material delimiting the through-opening of the actuator housing on the peripheral side. - having an exhaust gas turbo-charger comprising a compactor and a turbine, which has a turbo-charger housing, - having an actuator comprising an actuator housing for adjusting a variable turbine geometry apparatus and/or a waste gate apparatus of the turbine, - having at least one screw connection for the releasable fastening of the actuator housing to a housing flange of the turbocharger housing, wherein the at least one screw connection comprises: - a through-opening provided in the actuator housing, which is delimited by plastic material of the actuator housing, - a cutout provided in the housing flange, which is delimited on the peripheral side by an inner threading made of a metal, - a fitted bolt which has a screw body which transitions axially into a screw head, - wherein the screw body has a first axial body portion, facing away from the screw head, having an outer threading formed so as to be complementary to the inner threading of the cutout, and a second axial body portion arranged axially between the screw head and the first body portion, wherein a first body portion diameter (d 1) of the first body portion is smaller than a second body portion diameter (d 2) of the second body portion and a head diameter (d K) of the screw head is greater than the second body portion diameter (d 2), - a through-opening provided in the actuator housing, which is delimited by plastic material of the actuator housing, - a cutout provided in the housing flange, which is delimited on the peripheral side by an inner threading made of a metal, - a fitted bolt which has a screw body which transitions axially into a screw head, - wherein the screw body has a first axial body portion, facing away from the screw head, having an outer threading formed so as to be complementary to the inner threading of the cutout, and a second axial body portion arranged axially between the screw head and the first body portion, wherein a first body portion diameter (d 1) of the first body portion is smaller than a second body portion diameter (d 2) of the second body portion and a head diameter (d K) of the screw head is greater than the second body portion diameter (d 2), - wherein the fitted bolt passes through the through-opening of the actuator housing with the second body portion and engages with the outer threading of the first body portion into the inner threading of the cutout, such that the actuator housing is clamped between the housing flange of the turbocharger housing and the screw head of the fitted bolt, and - wherein the second body portion of the fitted bolt forms an interference fit with the plastic material delimiting the through-opening of the actuator housing on the peripheral side. - wherein the second body portion of the fitted bolt forms an interference fit with the plastic material delimiting the through-opening of the actuator housing on the peripheral side.