I am trying to make a 1in 14TPI internal thread using the IPS. In using IPS for other processes I know its not perfect, but how does it calculate the K value?
If K = (major dia. - minor dia)/ 2, then according to my machinist handbook page 1284
K = (1 - .923) / 2 = .0385
But IPS gives me .056, where is it getting this value from?