Dad needed some plugs to keep dirt and debris out of his propane cylinders. I'm sharing both models. This one is for the newer propane bottles that have threads on the inside and outside. It's the same model, but this one was shortened to fit in front of the valve mechanism.
It fits, but the jury's still out on what propane might do to PLA, so print and use at your own risk.
The author hasn't provided the model origin yet.