Hi, are there any of you fine chaps & chapesses out there, who would know what the type and size of the thread on the OX-YOKE ORIGINALS, black powder phosphor bronze bore brushes ? As I have a load for sale (N.O.S/N.I.B), whisome of the members in our club said they would have but the thread is the wrong size, and I want to make some adaptors on my lathe.
They're definately not metric and they look something between 1/4" & 5/16",
But I need to know exactly, so I can get myself a Tap & Die (or a set in imperial UNC or UNF)

Any help appreciated, I may just take the brush some where and see if I can sort something out, but in the meantime, a bit of knowledge, goes a long way.

All the best
Baz