Originally Posted by
cayugad
It was told to me that once, there used to be a wrench that removed the very early vintage breech plugs from Thompson Center Hawken and Renegade rifles. My understanding is they used to be able to be removed. Why, I have no idea. So maybe this was a replacement part for that.
It's not that
Cayugad. It's the socket head clean out screw for the bolster.