I needed to cover up two holes in my ikea platsa, so i quickly made a customizable hole cover, that can be screwed on with a spacer in the back.

In the attached 3mf the cover and the backplate are 13mm in width, a thickness of 1,25mm / 2mm and the through hole part is 17mm deep.
You can customize it simply by editing the spreadsheet in the freecad file.

For the assembly you will need:
- 1x M2x10 or M2x8 self tapping screw

I have printed it with esun ABS+ with a 0.4 nozzle and a 0.2 layerheight.