I quickly needed to see the temperature coming from the AC in my car since I suspected the AC gas is running low, and I had one of these thermometers with humidity sensors laying around. The thermometer is purchased on Amazon but I know you can get them elsewhere, and the hole dimension is 41 mm wide and 15 mm deep.

The print is easiest printed on its side with the hexagonal side that has the clip placed on the print bed.

The photo is the latest print I made in PETG, with 0.2 mm/0.2 mm fuzz on the print for esthetic reasons.

It prints without need of any supports on a Bambu Lab P1S