Hello guys,

I just bought an old two-piece rifle cleaning rod and the tip accepts the Parker Hale brushes that I ordered from Peter Dyson. The thread size is a mystery to me though. The major diameter is 0.198" but the pitch is something strange to me--close to 27 or 28 threads per inch but not a match to either. The thread form doesn't look quite like a standard 60-degree V style either. Do any of you know what these threads are? Is it likely to be a Whitworth or B.A. thread? I would like to make an adapter so that I can use standard brushes that are available in the U.S. but I'll need a tap in order to make this adapter.

Thanks,

Jim