Screw-on hanger

Print without supports. There is 1mm in diameter in thread so it should work without problems.

Hanger and nut may be in every material, I have used PET-G.

There is also gasket. It's not necessary but it will help with mounting. If you want to print it - do it with any elastic material.

I have printed it with TPU and - in slicer - I have turned off top layers (look at photo). Use also the same orientation - to have bottom side (with full layers) touching nut.