GM Steve,toggle quoted messageShow quoted text
Engage pedant mode.
Well, there's ISO Coarse and ISO fine series metric thread pitches but I agree only one common pitch for each diameter. And what's wrong with Whitworth? It is nice and coarse and so ideal for cast iron :-) Oh, and also Aluminium...
73, Alan G3XAQ
Thread pitch is easy with metric because there is only one standard pitch for