Hight Adjustable Screw Head Cabinet Foot (M12)

I needed foots for my 3D-printer drawer cabinet. They has to be adjustable so the cabinet does not wiggle around. I created these screw heads to fit on a M12 screw.
With the nut embedded in the lower crossbars I am able to adjust the hight of each foot.
They also have grooves for easier handling.

In the slicer you have to adjust the hole width by -0.5mm otherwise the screw will be a bit loose. You can glue the head to the crew but I wanted it to have a tight fit. So by decreasing the hole width the head can be pressed onto the screw with vice.

Key-width: 19mm
Screw: M12