what is difference of metric thread,npt thread,pt thread of thread rolling machine
what is difference of metric thread,NPT thread and PT thread of thread rolling machine? Metric thread is the thread standard in China. Npt thread is National (American) Pipe Thread , use in North America area, belong to usa standard 60 degree PT thread is Pipe Thread, use in Europe and uk, belong the Whitworth thread. If you have more question, please Contact way: tel/whatsapp:008615132996655
October 07,2021
