Abstract: An electronic chassis is disclosed for supporting components such as a CRT device or flat panel display unit and adapted for installation through an opening in a cabinet without requiring access from within the cabinet to secure the chassis in place. The frontal end of the chassis has flange members on opposite sides which fit against the cabinet surface around its opening. One side of the chassis frontal end has a movable retainer means controlled by one or more drive screws that can be adjusted to grip one side of the cabinet opening. Continued actuation of the drive screws moves the chassis into locking contact with a fixed retainer means on the opposite side of the chassis. A bezel frame member attached to the frontal end of the chassis covers the drive screws but has access holes to facilitate their adjustment, and gaskets are provided on the bezel frame to prevent moisture from entering the chassis or the cabinet opening.