I have 2 one-piece stainless steel cleaning rods I bought back in the mid-1960's. I believe they may be from Belding & Mull. The rods appear to have a special thread, but I have no clue what it is. It's 32 threads per inch, but smaller than #8 and larger than #6. Does anyone know what thread size Belding & Mull used? Are there any adapters to convert to the standard #8-32 thread common for bore brushes and jags?