Excuse me for the poor photo quality.... Here is just a piece of an insulator. It has threads on the inside. I found this while working on a house in Red Lodge.. it really has me stumped. I tried to show the profile of the insulator with my drawing. I've looked through the price guide at all the profiles, and can't find anything similar.. Hopefully someone here may know..

The piece is not in my possession, and I did not ask the owner where it was found.. but I can ask...