u/Apprehensive-Bad2440

I apologise for my lack of knowledge, ive never used any cad software at all prior to yesterday. Ive managed to get the majority of what i want dine and finished. The bit im struggling with is making a screw cap for my piece. As ive never dealt with designing anything i have no idea what size to make the hole im tapping for threads. The male threads are 20mm diameter,, 1mm pitch, 4mm length. Any help would be appreciated. Ive no idea about tolerances or anything so please do explain like im a toddler 😂. Again apologies for being incapable but i dont want to get the wrong bits made. Ive attached a video of the male piece that needs the cap.

Im wanting to get a few bits cnc'ed. Has anyone had the ball vape housing bits cnced? Any chance theres any of the 3d cad files knocking about? Ive never had things made up before so wouldnt have a clue where to start with designing the 3d files necessary. Any help is appreciated.

Built a titanium and ruby ball vape with bits from around the web, i have been using cannabis most of my life in many forms. Over the last few years ive tried to stay on the mighty plus for health reasons more than anything but also to comply with my prescription (ive failed miserably i must say 😂, ive been using an enail for dabs most of my medical journey while the mighty takes the backseat). I am more stoned off of 1 pull of this than i ever was off a sesh on the mighty and off of a single dose worth. Cant believe what ive been missing 😄. Efficient doesnt begin to describe it and the best part its completly compliant with my prescription and very hard hitting.