Closed-head drum from thermoplastic plastics material, having an inserted liner composed of a thin-walled plastics material film, comprising a cylindrical drum wall, a disk-shaped lower base, and a disk-shaped upper base in which two bung connectors (18, 20) which are closable by means of a bung closure are disposed, wherein the one bung connector is configured as a filling and retrieval bung connector, and the other bung connector is configured as a ventilation and aeration bung connector, one respective filling and retrieval liner connector and one ventilation and aeration liner connector of the liner being in each case fastened in said bung connectors (18, 20), wherein the bung closure for the ventilation and aeration bung connector is configured in multiple parts and has at least one lower adapter ring and an upper union or ring nut which both are in each case provided with one centric passage opening (50, 70), and furthermore has a centric bung plug which is screw-fitted into the centric passage opening of the adapter ring, wherein the adapter ring is fixedly welded to the upper end of the ventilation and aeration bung connector of the liner, and by way of a flange ring of the screw-fitted ring nut is fixed in the ventilation and aeration bung connector of the closed-head drum, wherein both bung connectors (18, 20) are configured as identically-sized standardized 2" bung connectors having an internal thread having a BCS 70 x 6 screw fitting, characterized by the following features: - both bung connectors (18, 20) have a sealing bed that lies below the internal thread; - the bung closure for the filling and retrieval bung connector is configured as a commercially available standardized 2" bung plug having an external thread having a BCS 70 x 6 screw fitting and a sealing ring lying therebelow, said sealing ring sealing against the sealing bed in the filling and retrieval bung connector; - the filling and retrieval bung connector, below the internal thread at the tightest passage point of said filling and retrieval bung connector in the connector neck, has a smoothed, annular flat weld bed inner surface to which the upper end of the filling and retrieval liner connector of the liner is fixedly welded; - the bung plug screw-fitted into the centric passage opening of the adapter ring is configured as a commercially available standardized %" bung plug having an external thread and a sealing ring lying therebelow; - the flange ring, engaged across by the screw-fitted ring nut, of the adapter ring, on the lower side thereof, on the external periphery has an encircling sealing ring, and seals the drum interior against the sealing bed below the internal thread in the ventilation and aeration bung connector. - both bung connectors (18, 20) have a sealing bed that lies below the internal thread; - the bung closure for the filling and retrieval bung connector is configured as a commercially available standardized 2" bung plug having an external thread having a BCS 70 x 6 screw fitting and a sealing ring lying therebelow, said sealing ring sealing against the sealing bed in the filling and retrieval bung connector; - the filling and retrieval bung connector, below the internal thread at the tightest passage point of said filling and retrieval bung connector in the connector neck, has a smoothed, annular flat weld bed inner surface to which the upper end of the filling and retrieval liner connector of the liner is fixedly welded; - the bung plug screw-fitted into the centric passage opening of the adapter ring is configured as a commercially available standardized %" bung plug having an external thread and a sealing ring lying therebelow; - the flange ring, engaged across by the screw-fitted ring nut, of the adapter ring, on the lower side thereof, on the external periphery has an encircling sealing ring, and seals the drum interior against the sealing bed below the internal thread in the ventilation and aeration bung connector.