Test prints for the 5 different thread profiles from dans98. I have created a screw and nut for each profile. Each with 0.2mm spacing.

You can find the profiles here.

You will need a free Fusion app to integrate the profiles in Fusion.

Then follow the instructions and copy the thread profiles into the specified folder.

The description on the screws and nuts is in relation to the profiles: FDM50MetricTrapezoidalThreads -> Bolt / Nut 50 (25 degree per side, so not easy to print)

I had the best results with the 70 profile.

I couldn't screw 50 and 60 together completely without problems.

The cover picture is the thread of the 70 profile.