We are an Exporter of Thread Ring Gauges in worldwide. Thread Ring Gauges are used to check the outside major diameter and pitch diameter limits on threaded parts. Available in ACME, Straight pipe, and Taper pipe styles. Thread Ring Gauges are typically cylindrical and fabricated from a stable material with an exact bore in their center that functions as the gauge for the outer diameter of parts. These are also used to measure male threads, such as those found on screws and bolts. The Gauges are considerably more reliable and accurate than leaf-style gauges.