Cable grommet in 2 pieces which lock together by the screw thread

58mm diameter so should work from 58mm to 70mm hole size

10mm hole for cable

The hole in the nut is large enough for a UK plug to fit through

I used a 57mm hole saw for my project in 18mm ply which ended up just over 58mm.

printed in Esun matt PLA

please see my other upload for the blanks