The question was, "what is the thread pitch for a uni-loc insert?".
Here is a picture showing a 3/8 10 tap, 3/8 10 allthread and a
3/8x10 Uni-Loc pin. If you look at the Uni-Loc pin you can see lines
from the original threads. This is the minor diameter of the 3/8x10 allthread.
They cut these...