My take of the old captured bolt. 1mm and 1_5mm refer to the gap between the bolt and nut. On my Prusa the 1mm was a bit hard to turn at 1st and the 1_5 is just a bit sloppy but acceptable.

Printed with the bolt standing up, the nut near the bottom. Use "Support on build plate only" (PrusaSlicer) or eq. I used .3mm layer height with PLA.

Enjoy!