Not as I know of, normally a hole is cut in plastic tanks and a proper tank connector is used. However there isn't a fitting I am familiar with that will allow an imperial connection. What are you connecting?
I charged ahead and cut the hole and tapped it. The fitting will hold only an air vent hose. I spoke with the MFG. of the tank and with a Rep. from an adhesive company. Both avoided comments that would allow future litigation--Gads, what we have come to--and both let me know that what I am up to is common and with little or no risk.
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