Thread standards
Thread Content
When is threaded connection preferred for general instruments, and how is the thread specification determined? When is a movable ferrule threaded connection used?
For small diameters, threaded connections are used.
Small-diameter connections have low pressure and are used for threaded connections
The process connections for instruments generally use 1/2NPT, Rc1/2, etc； For electrical connections, G1/2, M20x1.5, etc., are commonly used. Sealed threads should be chosen when sealing is required, while standard threads are sufficient when no sealing is needed.
At what small diameter is threading used for connection? There are many common thread specifications, such as M27*2, M16*1.5, and so on. Which one should be chosen?