Thread Limit Gauge：Used to inspect female thread. The passing side and stopping side make up a single set. The thread is considered to be acceptable if the passing side passes with ease and the stopping side does not cut in after two rotations. The inner diameter pin gauge is usually used for micrometer management of cutting wire tapping or confirmation of the inner diameter size of the internal thread after the extrusion wire tapping.
Plain Plug Gauge：Also known as plug gauge. A gauge used to measure dimension of hole.
