Hi I am really new at creating threads on Autocad and screws in general. I'm currently working on a project that requires M3 flat head screws. I was wondering how many turns I can do on AutoCad just knowing the thread depth I have.

I am clueless if I am to look at the thread pitch, or something else. Also, am I supposed to make the thread holes smaller than the actual diameter of the screw, so that it will catch?

Any help would be appreciated.