| "Do they make a drain receptor with female threads on the inside that could be glued to the 2" pipe afer the base is set, and with the drain grate screwing into that?"
They do but I'm not too sure you can use it on a manufactured shower base. It's called a "flange type shower drain", (see image) and its used with custom built tile showers.
We don't build/assemble shower enclosures. A plumbers work ends when we do the drainage since the shower valve's already in place. You might try reposting your question over in " Internal Home Improvement" Good luck, Tom
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