This design is threaded male or female with diameter of 32mm(inner dia. for female)
For male it has no offset, female has and offset of 1mm that what the best fit that I get with my printer, you want to offset a bit more or less base on your printer and your preference.
I print my model with layer height of 0.1mm with PETG
Female inside diameter offset 1mm so 33mm inside diameter



Tried if with 30% infill and air leaks in maybe 100% infill will make it water tight seal but considering filament cost its really not the best option .
The author marked this model as their own original creation.