A tapping armature for liquid containers, in particular for being connected to the outlet port or the outlet opening of a transport and storage container for liquids, the tapping armature comprising an armature housing in which a valve body pivotable by means of a valve shaft and serving to open and close a flow cross section of an outlet tube is disposed, a connection end of the valve shaft for being connected to the valve body being disposed in the outlet tube of the armature housing and an operating end of the valve shaft protruding from the armature housing through a housing dome formed on the armature housing. A form-fitting engagement is established between the housing dome and a valve shaft portion housed in the housing dome in order to axially secure the valve shaft in the armature housing.