This can be used to put under legs when there is a large differences with other legs on uneven floors. By screwing it in or out you can adjust it from 12mm to about 16mm. For different thicknesses the Fusion 360 model is included. Simply modify the thread length to make it taller or shorter. 

Of course if you want to lift a piece of furniture higher you can print a few of these and add more threads for strength.

I don't know how much weight this can hold. I used it for a small under counter refrigerator and we will see how well it lasts. For strength avoid making the thread length too short and make sure to put enough walls and a strong infill. I used 5 walls, gyroid 25% infill using PLA. 

The design was optimized to print with-out supports. I included an image of the recommended orientation so that all overhangs are 45 degrees at most. I printed my model at 0.16 layer thickness but 0.2 should work fine as well.

The model if not optimized for other parameter changes so if you want something wider and a different shape the design will need to be modified.