A vehicular safety restraint inflator device, the inflator device includes a tubular housing to provide inflation gas to inflate an associated inflatable restraint device and a toroidal clamp stop positioned on the tubular inflator housing. The clamp stop serves to provide a hard stop for an inflator attachment clamp to secure the inflator device within an airbag module and thus to minimize or avoid undesired lateral movement of the inflator device within a module assembly.

An inflator comprises a housing having a base, a wall extending from the base, and an inner volume at least partially defined by the base and the wall. A pyrotechnic gas generant material is disposed within the inner volume and an intumescent material is also disposed within the inner volume. The base may have an inner surface and an outer surface, and the wall may also have an inner surface and an outer surface. The inner surface of the base and the inner surface of the wall face the inner volume. The intumescent material may be in contact with the inner surface of the base and/or the inner surface of the wall. Alternatively, the intumescent material may be disposed outside the inner volume and may be in contact with the outer surface of the base and/or the outer surface of the wall. An airbag module may include the inflator.