Originally Posted by phunk

Most of the fuel pressure gauge kits I sent out, I included a 1/8 npt plug in the billet fitting. Only the first few that went out didnt get them. Its not listed as included but I figured I should include them anyway. At any rate, if there was a plug in your billet gauge fitting I sent you, it will probably fit right in there.

Originally Posted by SouthArk370Z

Are y'all sure it's 1/8" NPT/NPTF and not 3 mm (or other metric measure) with metric pipe threads? Just wondering as most of my mechanicin' has been on "English" stuff, not metric.