hardware for sliding mirror closet door

Question

The part identified by the red circle is the mounting mechanism for this bifold mirrored closet door. I need to find the entire piece. There is a marking on the bolt in the black area that says either "330-170-4" or "330-140-4". The door is original to the house, which was built in the early 1980s. Any assistance you could provide would be greatly appreciated. Thanks.

Paul · Accepted Answer

I see some resemblances between your piece and our 21-024 bi-fold top door pivot. Could this be the part you're looking for? Take a look and see what you think.