Limit gauges which has gauging surfaces based on maximum material limit and least material limit of hole.
Purpose and procedures for use of limit gauges
■ 通端塞规：Go plug gauge
This is a gauge to inspect whether the diameter of hole is larger than the specified MML or not ,and this shall pass through the overall length of hole without any difficulty.
■ 止端塞规：Not Go plug gauge
This is a gauge to inspect whether the diameter of hole is smaller than the specified LML or not,and this shall not enter into the hole.