Screw=90 mm+the cap which is about 12 mm.
Bolt=10mm

I designed these for the making of a dry cell hydrogen generator because i can't use metal screw in the inner section.

I haven't tried printing this yet, but I will update this when I have and tell you if works.

I used a CAD-program called Designspark Mechanical, and by whatching a video on Youtube I learned how to make the thread.

https://www.youtube.com/watch?v=6GZXIrbvh80