Thumbscrew with an extended threading. This allowed me to tightly mount my creality camera to the following bed handle (not my model): https://www.thingiverse.com/thing:5922828
It prints fine, the fit is very tight, too tight.
I'm afraid that one day the model will snap and part of it will stay inside the threaded hole.
I wish the designer uploaded a profile that is a bit finer - 0.08-0.12mm.
I ended up changing the profile in Bambu studio and re-printed.