7.9.3.13.1.  Cylindrical thread by length
7.9.3.13.1.1. Outer thread with example pin
7.9.3.13.1.1.1. Regular thread
7.9.3.13.1.1.2. Different pitches and derived automatic calculations for e.g. Row Label and Core diameter
7.9.3.13.1.2. Inner thread using the example of a cap nut