This is a 120 VAC receptacle wall plate spacer I made for my Winnebago Itasca Sunrise motor home. A window was left open in my RV on a rainy day. Rain got to the spacer and made it swell up. Besides ruining the spacer, the swelling had enough force that it cracked the factory electrical outlet.
I made this spacer with the hole larger than the original to allow the replacement outlet to slip through the hole without disconnecting the wires.
This spacer is the same wall plate spacer used in many other RVs. Winnebago part #133713-01-20A (White).
In case you need a replacement outlet, here's the one I used (Does not include the wall cover plate):
This spacer would also be the perfect solution if you need to mount an outlet in any other place that has a shallow depth wall, e.g. a basement wall, a van conversion, etc. Too thick or not thick enough? Simply scale the Z-height in your slicer with proportional scaling turned off.
Check out my designs page to see other useful things I have made for my RV.