Print Working ISO Standard "M" Threads

Using the ISO standard as described in the attached ThreadTech diagram, I was able to print very usable screw threads using PLA, at 0.2 line thickness.

The ONE adaptation needed is that I had to increase the diameter of the female thread by 0.8mm. This gave me threads that mated with very little resistance (almost zero). I could probably have safely decreased the diameter difference to 0.6mm. Note that at a diameter difference of 0.4mm, I was not able to screw the nut and bolt together. [