The thing allow connect the system https://www.thingiverse.com/thing:2194278 to tripod.
Holes for anti-rotating pin (there is one on some tripods) put on 4 sides to allow connect it to the tripod as you want.
Thread diameter increased on 0.3 mm to allow to fit the printed thread with no problem (if one need more or less there is source file where it can be changed)
Parameters of the connector was "reverse-engineered" so will be happy to fix if something is not correct, but in my case it work without problems.
Das Filament PETg
The thing specially made to be printed without supports.