Disclosed is a vent assembly that includes a fin/actuator sub-assembly that includes an aperture, an inner ring that includes a plurality of protrusions, each protrusion including a retention surface, and an annular retaining member, wherein when the annular retaining member is in a retaining engagement with the fin/actuator sub-assembly and the inner ring, a portion of the annular retaining member is disposed within the aperture of the fin/actuator sub-assembly, and portions of the annular retaining member contact the retention surfaces of the protrusions of the inner ring.