This is a customizable barrel nut commonly used in furniture kits. I lost a couple when moving things around and designed this to replace the missing plastic barrel nuts.
I am aware of one other one: https://www.thingiverse.com/thing:2751283 but it wasn't the size I needed and isn't customizable, but has threads. Check it out in case it happens to be the size you need.
Notes
I used 3 perimeters. I think most of the print settings can be adjusted without affecting the final result too much.
Post-Printing
This doesn't have threads. I heated the bolt and screwed it in while still hot, then let it cool and removed it. Assembly after doing this was easy.
The author marked this model as their own original creation.