Will any flange fit this at the wall?A. The Newport Brass 203 is 1/2" ips. Your flange will have to be at least that size.
Does this have a 1/2" NPT connection?A. The Newport Brass 203 has a 1/2" connection.
I am interested in a polished brass shower arm. What is the impact of uncoated?A.
The Newport Brass 203 is available in uncoated polished brass, which will slightly change color over time as compared to the forever brass; which is a coated brass.