Abstract: Locking configuration of an adapter (9) or a thrust element having a pullout guide (4), which is fastened on a furniture body (2) of a piece of furniture (1) in a household appliance, the pullout guide (4) having at least one guide rail (5), which is fastened on the furniture body (2) or in the household appliance, and a slide rail (7), which is movable in the guide rail (5), and the adapter (9), the thrust element, or the slide rail (7) having at least one receptacle opening (13), and the slide rail (7), the thrust element, or the adapter (9) having a hook (18), which is insertable in the receptacle opening (13), for locking the adapter (9) or the thrust element with the slide rail (7), the receptacle opening (13) being shaped so that the hook (18) is insertable transversely to the movement direction (X) of the slide rail (7) and is subsequently displaceable in the movement direction (X) of the slide rail (7) and at least one recess (15) being provided on the adapter (9), the thrust element, or the slide rai