i have a job that requires a special kind of thread. ive never done them before, but through my research it looks like some kind of gas piping thread. the actual thread is an .825-14 NGO-RH thread. I am making the male end so i will need the external thread specs. if anyone could give me the hi/lo for the major and pitch diameters it would be greatly appreciated. (or tell me where to get it. ) thanks