[TomInCologne]

* pedant mode on *


sorry for being a bit anal and, hopefully not, confusing the original poster...


Not all pipe threads are tapered, that is plainly wrong. For instance most (1) female pipe threads are parallel, that is the case in NPT, NPS, BSP, G and R. But you also have parallel male threads, like G or NPS. It depends on where you want to seal the thread, within the thread itself or on, for instance, a shoulder with a sealing o-ring.


Sorry for the rant but this is my pet topic...



(1) i say most, because there are also tapered female threads, like Rc.


* pedant mode off *