Well, almost don't know where to start here. Received parts referenced above and not even close. I don't really know much about inverted flare sizes, but the Trucool says it's fittings are 3/8"-24 inverted flare. That's what I ordered and what I received. Not close to the right size. Trucool also says on their website, if you look hard enough, that the the threads are 5/8"-18 and I measured them and that's what they are. The O.D. of the threads on the fittings supplied are 5/8" O.D. and 18 TPI. The fittings I ordered are 3/8"-24 and the O.D. on those threads are around 1/4". Much, much smaller.
After beating my head against the wall some more I went a different route. Was going to just get a 3/8"x1/2" hose adapter splicer, but really hate to have that many joints and clamps.
Went to Ace and bought a couple of 1/2" hose barb by 1/4" male pipe thread fittings. Part #4504270. The 3/8" hose barb end on the Trucool fittings slide right inside the 1/2" Ace barb end.
So, I cut off the Ace fitting at the base of the hose barb and then drilled it out just a little more so the Trucool fitting was a little loose in it. I then heated it up with a torch and soldered them together. Used lots of flux and the loose fit allowed the solder to flow from one end to the other.
Now I have the stock Trucool fitting with a 1/2" hose barb on the end just like is needed.
It's only solder and not brazed, but can't imagine it not being strong enough and with the solder running the entire length of the barbs it should be leak proof. Solder melts around 350 degrees so I should be OK there.
Haven't installed it yet, but maybe after Turkey Day. Before I do this, anyone think my solution has problems and just using a 3/8"x1/2" barb splicer might be better?