Skadis T-Nut ring with 18mm inner diameter

This is a horizontal ring with an inner diameter of 18mm for mounting on the IKEA Skadis board.  The included freecad file should be parametric enough to create any other sizes required.

I use it to secure the end of a digital caliper, to prevent it from falling even if it is knocked off the hooks at the head end.

It uses the Skadis T-Nuts mounting system from 6d6178.  You will need only one nut and the M2.5 hardware to attach it.  I use an M2.5x16 screw.

No supports are needed when printed in the upright orientation.