The ring gauge we usually refer to refers to the pass gauge and the stop gauge. It is a gauge used to check whether the thread data is qualified. The pass gauge and stop gauge The function of the ring gauge is to standardize the thread diameter and  thread rolling die data during the thread manufacturing process, so that the outer and middle diameters of the threads are controlled within an appropriate range to achieve the best performance of the screws. . The wire diameters of the thread rolling die  produced by our company are within the standard range, and the screws can meet the requirements of pass and stop. Welcome to inquire!