Flipp, I figured out the thread by measuring it with dial calipers. The outside is called "major diameter", and distance between threads is the pitch. Then I started searching Google for that thread, when I found the breakaway that acknowledged the thread existed, but it wasn't used for much.
JimmieC, yes that's what I was thinking about... if I could make a set for $5 I would, but for $60 a pair I wasn't going to buy a set.