This is the case for a panel mount switch that can be used with a common 6*6mm switch and a 7*12.5mm spring, it's pretty fast and easy to print, it doesn't require supports in any model, I would like to create a big collection with useful electronic 3d models ready to print. The render shows the order in which the pieces go but it's pretty simple.

It all fits together tight the important thing is to print the body not at 0% infill cause it might crack when fitting the parts together

Depending on how well-tuned your printer is you could have to either glue or file the parts for a better fit, in my case it all fits together pretty well

https://www.youtube.com/watch?v=gUytsfc47ls