Uh-oh here we go again. Tubing size, hose size and the end fitting that goes to that is confusing enough for most. Now start adding the thread size and pitch (length) of the thread of the fitting in relation to the size of the "hose or tube", that will just mess up all the works at the north poll. I'm not criticizing you are absolutely correct. I work with what a lot of folks think would be intelligent assemblers and believe me most of them screw it up and they have part numbers and prints to go off of! Just trying to clarify hope I did not upset anyone.