Dial Indicators, Micrometers, Calipers manufacturer / supplier in China, offering Unf Thread Ring Gauge Go and Nogo with ANSI B1.2-83 Conform Standard, Unf Customized 1-72 Thread Ring Gauge Go Type with 2b/3b Accuracy, Unf M24X3.00-6g Inch Thread Ring Gauge for Testing Unified Threads and so on.