22mm panel plug/light bezel

thingiverse

This piece fits snugly into a standard 22mm panel hole, serving as a placeholder or, as in my case, a semi-transparent plug that allows users to see the brightness of a 100w lamp used as a current limiting device in a variable A/C bench supply I'm building. It matches the size of standard 22mm panel push buttons, as shown in one of the project photos. Not needing threads and a nut to hold it in place, I simply pressed it in and secured it with a blob of hot glue on the back of the panel.