Really simple print this one; I put an unsightly screw into a dry wall for holding up a calendar and didn't like the big gap around the screw and the plasterboard, so just took to Tinkercad and “designed” this. You may have to fiddle around with the scaling of the washer (I'm calling it a washer) to fit your scenario. I was using a 5mm screw requiring a 7mm hole, so there was an appreciable gap around the screw itself. This worked great. I also knocked up a cover for the end of the screw (see my other download) which I held on with double sided tape so it's not too permanent.