A connector and/or adapter with (i) a connecting piece for connection to a suitable counterpart for the purpose of substance transport (ii) whereby the connecting piece contains (a) a cone and (b) a securing means for reversibly securing a connection to the mating component, and (iii) a hose, and (iv) a displacement range and (v) a sleeve, which is fitted, (a) to be at least partially rotatable about the connecting piece and/or on the displacement area, and (vi)wherein at least one latching means (16, 26, 62) is provided on the connector and/or on the sleeve for the non-detachable latching of the connecting piece with the sleeve, wherein the connector is designed such that in a non-detachably latched state of the connecting piece with the sleeve a displacement of the sleeve relative to the connecting piece is limited in all directions, characterised in that (i) the sleeve and the displacement area are designed such that (a) the sleeve has at least one engagement means, (i) wherein said at least one engagement means is arranged to be at least partially connected to the displacement region so as to at least partially enclose the displacement region such that said at least one engagement means defines an opening which is smaller than a maximum extension of the cross-section through the displacement region perpendicular to a longitudinal extension of the displacement region, and in that (ii) the sleeve is designed in such a way that in the non-detachably latched state of the connecting piece with the sleeve (a) makes it difficult and/or prevents the operation and/or release of the securing means by at least partially covering the securing means and/or the counterpart and/or the connector. (i) a connecting piece for connection to a suitable counterpart for the purpose of substance transport (ii) whereby the connecting piece contains (a) a cone and (b) a securing means for reversibly securing a connection to the mating component, and (a) a cone and (b) a securing means for reversibly securing a connection to the mating component, and (iii) a hose, and (iv) a displacement range and (v) a sleeve, which is fitted, (a) to be at least partially rotatable about the connecting piece and/or on the displacement area, and (a) to be at least partially rotatable about the connecting piece and/or on the displacement area, and (vi)wherein at least one latching means (16, 26, 62) is provided on the connector and/or on the sleeve for the non-detachable latching of the connecting piece with the sleeve, wherein the connector is designed such that in a non-detachably latched state of the connecting piece with the sleeve a displacement of the sleeve relative to the connecting piece is limited in all directions, characterised in that (i) the sleeve and the displacement area are designed such that (a) the sleeve has at least one engagement means, (i) wherein said at least one engagement means is arranged to be at least partially connected to the displacement region so as to at least partially enclose the displacement region such that said at least one engagement means defines an opening which is smaller than a maximum extension of the cross-section through the displacement region perpendicular to a longitudinal extension of the displacement region, and in that (ii) the sleeve is designed in such a way that in the non-detachably latched state of the connecting piece with the sleeve (a) makes it difficult and/or prevents the operation and/or release of the securing means by at least partially covering the securing means and/or the counterpart and/or the connector. (i) the sleeve and the displacement area are designed such that (a) the sleeve has at least one engagement means, (i) wherein said at least one engagement means is arranged to be at least partially connected to the displacement region so as to at least partially enclose the displacement region such that said at least one engagement means defines an opening which is smaller than a maximum extension of the cross-section through the displacement region perpendicular to a longitudinal extension of the displacement region, and in that (a) the sleeve has at least one engagement means, (i) wherein said at least one engagement means is arranged to be at least partially connected to the displacement region so as to at least partially enclose the displacement region such that said at least one engagement means defines an opening which is smaller than a maximum extension of the cross-section through the displacement region perpendicular to a longitudinal extension of the displacement region, and in that (i) wherein said at least one engagement means is arranged to be at least partially connected to the displacement region so as to at least partially enclose the displacement region such that said at least one engagement means defines an opening which is smaller than a maximum extension of the cross-section through the displacement region perpendicular to a longitudinal extension of the displacement region, and in that (ii) the sleeve is designed in such a way that in the non-detachably latched state of the connecting piece with the sleeve (a) makes it difficult and/or prevents the operation and/or release of the securing means by at least partially covering the securing means and/or the counterpart and/or the connector. (a) makes it difficult and/or prevents the operation and/or release of the securing means by at least partially covering the securing means and/or the counterpart and/or the connector.