No offense Coyote; but concerning the
TRESCO vs TRESO, I've read about in several different posts, I thought maybe I was missing out on a totally different part.
After doing a WEB Search, I realized it has something to do with my eyes.

Several times I thought I read
TRESCO, only to go back to find there was no '
C ' found in it at all.
It caused me to do a double take. I couldn't believe it. One second I read TRESCO, and the next instant I read TRESO. At any rate AMPCO does make the Treso nipple, usually advertised as Treso-AMPCO. Even after carefully typing this, I still think I see the Non-Existing "C". That's Weird!

4B