I had to make 8 prototypes to get the threads just perfect, the nozzles now screw in easily and are very secure.
The holes for the magnets are 6.2mm and fit 6mm magnet.
Printed on a P1S with 04.mm nozzle and 0.2mm layer height.
Important to print outer walls first to improve dimensional accuracy of the thread and the magnet holes.
This is not for the standard Bambu nozzles but for the aftermarket nozzles like these or this one.
The author marked this model as their own original creation.