Injector line thread size

[Harry in Ky]

Would any of the injection pump gurus out there happen to know the size and thread pitch of the injector/line fitting of the Roosa Master pencil style injectors as used on many 30 and 40 series engines?

I have a couple lines on a 2440 where someone cross threaded the lines onto the injectors. Have new injectors coming but I'd like to check the internal threads on the line nuts before trying to thread them back on.

 

[Dieseltech]

If I recall they are 9/16 X 18 thread. Most new injection pumps have 12MM X 1.5 or 14MM X 1.5 metric thread. Early pumps used a lot of 9/16 X 18 Ermeto sleeve line ends.

 

[Harry in Ky]

Great. If that's what it is I'm sure I have a tap that size.

Thanks