On Mon, 7 Mar 2022 at 02:08, gene heskett <[email protected]> wrote:
> The thread is not a tapered thread, measureing 12.95mm in the threads > major diameter, and quite close to 1mm pitch, maybe .98mm? If the measurements are correct then it is not BSP either. https://en.wikipedia.org/wiki/British_Standard_Pipe (Which is the international pipe thread standard used everywhere except the US, a metricated imperial standard) 1/2" Gas thread fits the description: https://www.bodgesoc.org/thread_dia_pitch.html (Or possibly a "Brass" thread which were all 26 TPI) But seems very unlikely on anything made after the 1950s. Being pragmatic, I would run a die down the thread that I have a tap for, and fit a Dowty washer, -- atp "A motorcycle is a bicycle with a pandemonium attachment and is designed for the especial use of mechanical geniuses, daredevils and lunatics." — George Fitch, Atlanta Constitution Newspaper, 1912 _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
