Design of Gauge for Measuring Coupling Sealing Surface of Small-sized Premium Thread Connection

Described here in the paper is a gauge for directly measuring coupling sealing surface of the smallsized premium thread connection, involving the design principle, the structural characteristics and the specific operation procedure.Result of the actual operation of the gauge proves that the said gauge features accurate measurement, and easy operation and so on, which solves the problems as staying with conventional measurement process, i.e., hard operation, complexity of measurement, and rather big error.