A nut for Carp chair with M24 thread.
Becase there is plastic thread, I recommend printing with toughter material (ideally ASA). I used ABS, because that's what I had at hand.
Maybe you can try to add perimeters. It will be better for the thread.
I highly recomend printing with supports. The .3MF file has it configured.
The author marked this model as their own original creation.