Good question. I do mill the shafts to the same diameter as 4-64 thread, which is 0.120. This is the same size as the shafts on beads sold by NECG and Midway. What are the standard parker threads, I made the assumption the ones formerly available worked. Please educate me. I am small gunsmithing operation and I started making beads because I wanted to help out folks breathing life back into old sxs shotguns. If you can give me a fitted shaft diameter or a thread size I can try to make that happen. Let me know what you need. I was told be a couple restorers that they fit each bead and their installation always involves a dab of glue. But that's a small sample size. I'll try it. Toby
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