It is stipulated in the standard of pressure gauges in my country that the threads of the instrument joints are all metric threads. 1. Nominal shell diameter/mm: 40, thread size: M10×1 thread length: 102, shell nominal diameter/mm: 60, thread size: M14×1.5 thread length: 143, shell nominal diameter/mm: 100/150/ 200/250, thread size: M20×1.5 thread length: 20 Wuxi Huihua Instrument Technology Department
