The male end of the flow meter threads in "one" turn into a female adapter. So I guess it kinda fits. However, I am hesitant to have to use a wrench to turn it in more. I have tried the flow meter with a non tapered cylindrical 1/2" thread, and it threads in with out any issues. As well, the male end of the flow meter has a flat face which looks like it was meant to mate with a gasket of some sort to make a seal.