Review on Manchester Tank S33250: Durable Plastic POL Plug for Propane Gas Tanks by Roberto Manzer

Purchased to protect the propane tank outlet from bug nests when not connected to the RV water supply hose. It's fine for the purpose, but the fit of the protector is a bit sloppy, so you have to be careful when rubbing it into the propane tank's outlet valve to avoid screwing the soft plastic plug onto the tank's sharp metal threads. Remember that the steps are the "right hand" [opposite of the usual "right-tight" rule] on propane tank valves, roughly. All the best.