Abstract:The pressure gauge thread fitting is a connection between the equipment or pipeline used to connect the measured medium and the pressure gauge. Pressure gauge thread joint forms are diverse, pressure gauge thread fitting specifications and pressure gauge dial diameter has a certain relationship, different sizes of pressure gauge thread joint specifications are different, and pressure gauge thread joint size according to different thread standards can be divided into metric thread: Ma×b, imperial thread: G*", American thread: *" NPT, which leads to when there are a variety of thread specifications of the pressure gauge needs to be verified, the need to constantly replace the conversion joint, cumbersome operation and reduce the verification efficiency. In this regard, we have designed a technology that does not need to replace the adapter frequently, and can connect the pressure gauge of different thread specifications to the same adapter, in the verification of different pressure gauges, only need to rotate the adapter to realize the connection of the pressure gauge, which greatly reduces the joint disassembly work of the tester and further improves the efficiency of the verification of pressure gauges of different specifications.