Oxford Hotgrip Control Mount for 22mm Handlebar

Required: 2x M6 nuts (you will probably have to press them into place with a soldering iron).
You can use the supplied stock bolts with Grips (M6x27) or install M6x30 to your taste.
It is recommended to use Loctite to fix the threaded connection. I intentionally left a fairly narrow hole for the screw threads, it will help prevent loosening to some extent.

I printed in PETG with a small support for the holes for the nut, z-offset 0.1 (a little more time for cleaning, but more accurate).

I highly recommend calibrating your printer for the correct print sizes, and positioning the models as shown in the screenshot (this will achieve greater strength than using interlayer bonds).