Introduction of thread ring gauge
The thread ring gauge is used to measure the correctness of the external thread size. The end ring gauge has a groove on the outer cylindrical surface. When the size is more than 100 mm, the thread ring gauge is a double-handed thread ring gauge. Specifications are divided into coarse teeth, fine teeth, pipe thread three. Neither the level 2 accuracy with a pitch of 0.35 mm or less, nor the thread ring gauge with a level of accuracy higher than level 2 and the level 3 accuracy with a pitch of 0.8 mm or less, have no end.