A spin-on filter for a filtering device for fluid, the spin-on filter including: a housing pot, in which at least one filter element is arranged; a connecting body, which is arranged at an end face of the housing pot, the connecting body having a central opening; and a coupling device including a filter-side coupling part configured for detachably coupling the spin-on filter to a filter head of the filtering device; wherein the coupling part is arranged on the central opening; wherein the filter-side coupling part is configured to detachably couple to a connector of a head-side coupling part of the filter head by way of a plug-in and/or rotational movement with respect to a coupling axis; and wherein the filter-side coupling part includes a plurality of coupling ribs which are distributed in the circumferential direction of a coupling axis on the central opening and projecting radially inwardly.