I had a hard time understaning how to add tolerance to a screw and nut to print in a 3d printer, so I designed a small test. Screw and Nut Test with 0.2mm tolerance. Used to determine if your printer can print a screw and a nut that will work. Fusion 360 file is included, so you can see a cross section of how these fit, and can print them to see if your printer can handle a 0.2mm tolerance.
The author hasn't provided the model origin yet.