Thank you for the feedback :). I tried to minimize the tolerance as much as possible in order not to have it lose while grabbing the towel but I can change that, or scale down the model.
As others said, normal print is too tight for my taste, difficult to remove. Printing the hanger at 101% is tight but you don't need super strenght to remove it. At 103% as pointed out works fine, but too easy to remove and could be removed by accident.
Took a few tries to get it to fit correctly.
Ended up with 100% scale for the adapter and 103% scale for the mount/hook.
Broke multiple times with standard settings, so I printed on its side and had to adjust settings for better strength.
6 walls
25% Gyroid Infill
auto generated supports for slide channel