alternatively, since we're talking about cutting brass, someone could just turn a 15/32 thread in carbon steel, and use that to make a crummy tap, to cut threads in brass. UNS and whitworth are known standards, so the dimensions are easy enough to figure out... Would also allow for comparing the fitment of whitworth vs UNS threads. Looking under a microscope, the threads on my stove *appear* to fit a 60° thread gauge accurately, but I don't have an optical comparator to use, to be sure.
