In this particular field there is the need to measure several parameters: taper of pin and box, thread pitch, thread height, pin or box diameter, run in and run out.

В данной конкретной области техники необходимо проводить измерения нескольких параметров: скоса охватываемой детали резьбового соединения (?????), шага резьбы, высоты профиля резьбы, диаметра пальца или ? , овальности трубы ,??????

THREAD RUNOUT
The portion at the end of a threaded shank which is not cut or rolled to full depth, but which provides a transition between full depth threads and the fastener shank or head
http://www.boltscience.com/pages/glossary.htm