gasoline fumes

[alwaysFlOoReD]

If you have a decent tap and die set there will be a thread size checker in the kit. Or just buy one of each from amazon. They come in handy quite often, even tho I can usually eye thread pitch size pretty good.

 

[Paisano]

I checked the fuel line threads again. I did make an error in measuring. The threads are the same diameter on both. Most likely 9/16 from what I measured. My tap and die set doesn't have those sizes. I guess I can just try a couple nuts from the hardware store.

But here is another question for the lower male threaded fitting in the first pic. Notice the corresponding fuel rail line has that rounded or bowl shaped end.

Which one of these adapter fittings do I want to use for that fuel rail line end?
You can see the adapters below have ends with different shapes