fuel shutoff Early 28

[Wagga A'er]

i want to clean up the threads on my early 28 fuel shutoff valve.
I know these are a pipe thread.
Can anyone let me know the die sizes, I would need for the three threads on the shutoff.
Thanks
Dave

 

[dave in australia]

Being a USA product, they would be an NPT thread. BSPT is similar, but still different enough that if you use a BSPT threading tool, you will never seal it properly.

 

[katy]

The thread that goes into the fuel tank is 1/4" NPT (National Pipe Taper)18 TPI (threads per inch).
The thread where the fuel line attaches is 5/8"-18
A thread file can be used to clean up the male threads: https://www.amazon.com/General-Tools-177-1-Thread-Repair/dp/B000BOAU32/?tag=atomicindus08-20

Also see: http://fittingsandadapters.com/threadchart.html

 

[Wagga A'er]

Thanks for the help guys.
I was able to get it sorted out.