It is interchangeable with API connection types. Compared with API threads, under the same inner and outerdiameter conditions, it significantly improves torque resistance by 20%-40%; compared with API NC threads of thesame torque resistance, the waterway can be larger, reducing hydraulic pressure drop; and compared with API NCthreads of the same torque resistance, the outer diameter can be smaller, improving wear life.
1、Smooth ID transition of the water hole
2、 Additional shoulder increases torque capacity
3、 Less stress on thread so tensile capacity of thread is increased
