Banjo Corp TF200 Polypropylene Bulkhead Tank Fitting, 2" NPT Female

will this fit a 2.75" hole?

Is it threaded inside on BOTH ends or just the one?

Can i somehow use one end for a slip fitting? since the threads are fiberglass?

Since this is made of poly, can i twist on abs/pvc (which one is better?) male 2” fitting? do i use cement glue, threadlock or just teflon tape?