Apparatus and systems for coupling a base of an airbag inflator with a housing, such as an airbag module housing or an adapter housing configured to be coupled with an airbag module housing. In some embodiments, a vehicle airbag assembly may comprise a housing comprising an opening and a plurality of notches. An inflator comprising an inflator base may be received in the opening such that at least a portion of the inflator base extends out of the opening. A plurality of tabs may be positioned about the inflator base. The plurality of tabs may be configured to be received in the plurality of notches and misaligned with the plurality of notches by rotating the plurality of notches with respect to at least one component of the vehicle airbag assembly, such as a retaining washer, to prevent the inflator base from being withdrawn from the opening.