Just for fun, thought I’d throw this out for discussion. What do you think is the best way to call out an SAE straight thread port on a drawing? For example, you could call out all the individual dimensions so that every machine shop would be able to machine it even if they’re not familiar with it. In addition, a general note could be added to mention that a form tool (ex: roughing and finishing tool) is advisable so the shop doesn’t waste time trying to cut the port on a mill or lathe with conventional tooling. The only problem with calling out all the individual dimensions is that it’s really a waste of time. You’d think a shop could simply pick up the spec or locate the dimensions off the network such as is found here: http://www.inserta.com/PDF/AI-STR-THD-PORT-DIM.pdf When I was working in aerospace, we’d always use the MS equivalent and simply call out MS33649-06 for example. So I wonder if there’s an equivalent way of calling out an SAE straight thread port, such as SAE J1926-06. Have you ever seen SAE straight thread ports called out on drawings without having to dimension every feature? How have they done it?