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mike100 · 05-30-2013

I think it is 3/4" and the thread pitch is 14NC. I just repaired an air tube fitting and i got a bushing with the same external thread.

Interesting to note that many of the small block applications one-way air injection check valves are one size smaller.
The 63-504 fit on my repair: http://www.downwindmarine.com/Pipe-R...-90891187.html (note dimensions are for inside diameter and threads- the outside is 3/4's)

05-30-2013	#6
mike100 Join Date: Feb 2011 Location: San Marcos CA Posts: 1,786	Re: Need thread pitch / spec / dimensions... I think it is 3/4" and the thread pitch is 14NC. I just repaired an air tube fitting and i got a bushing with the same external thread. Interesting to note that many of the small block applications one-way air injection check valves are one size smaller. The 63-504 fit on my repair: http://www.downwindmarine.com/Pipe-R...-90891187.html (note dimensions are for inside diameter and threads- the outside is 3/4's) Last edited by mike100; 05-30-2013 at 11:27 PM.