Borgy,
Have your customer contact the rig manufacturer (if he recently bought a rig with the NWJ) or where he purchased the NWJ tooling. Have him ask for the thread drawings. If he says he has a local shop make special tools for him, I think they will send the drawings.
Meanwhile, I try to...
Burgy,
Although I have access to most drill pipe thread dimensions, I do not have the NWJ.
I don't know what you are making but there are a few options for your consideration.
1) Have a manufacturer thread the NWJ for you.
2) Purchase a sample piece with NWJ male x female
3) If you plan to...