A mounting adapter for attaching an object to a flat surface includes an anchor plate having a plurality of first apertures extending therethrough. Each first aperture is configured to receive a first elongated fastener having a length sufficient to fasten to a support structure located beneath the surface for attaching the anchor plate thereto. A plurality of threaded apertures is formed in the anchor plate. A cover plate is positioned over the anchor plate and has a plurality of third apertures that align with the plurality of threaded apertures in the anchor plate. A threaded fastener extends through each third aperture and is threadedly engaged with the second threaded apertures of the anchor plate for securely attaching the cover plate to the anchor plate. One or more fourth apertures are formed in the cover plate and configured to receive a third fastener for attaching the object to the mounting adapter.