Abstract: An enclosure for electronic and/or electrical components is disclosed, including a housing having a rear wall and longitudinally extending side walls. A longitudinally extending track is provided which includes a base leg and a pair of branch legs extending laterally therefrom. Each of the laterally extending legs is spaced apart by a gap from at least one side wall of the housing. A mounting bracket is slidable to and fro along the track, the bracket including at least one leg in sliding contact with a bearing region of the track and at least one opening for receipt therein of a fastener. The opening is positioned to direct the fastener inserted therein into engagement with a fastener engaging region of the track, whereby the at least one leg of the bracket bears against the bearing region of the track to prevent movement of the bracket relative to the track.