Originally Posted by
JohnDThompson
Those look like pilot sleeves for a bottom bracket facing tool. You thread them into the bottom bracket shell, and they ensure that the facer itself will cut perpendicularly to the shell thread axis. Campagnolo marked theirs, so yours aren't Campagnolo.
Thanks John! I didn't see your response. I don't have the rest of the tool, but will come in handy for checking threads.