Monomial Parameters Gages, The high precision gages are more than 20 kinds and widely used for oil fields to measure the monomial parameters of taper, pitch and height thread for pipe, tubing, casing and drill string. It is constituted by the transmission system of rigidity main body and indicator to control and improve the quality of thread. It meets and exceeds the specifications established by the American Petroleum Institute. (A. P. I).
Measuring the condition of buttresds-casing thread to make sure enough length of external thread and knowing that the thread is the thread vanishing point
Measure the coaxial variation between the central axis and the connecting thread of cannula and vitta.