Here are several pictures of the pivet bar. It comes from an aluminum window in a house that was built in 1992. From what I remember, the windows were maybe made by better Bilt. No markings exist that I can find.

Hello,
We heard back from another customer who was dealing with the same pivot bar and they mentioned that they had to remove the screws that hold the window frame together to access the pivot bar. You can view their thread here. Unfortunately, some windows are designed in such a way that they can't be easily repaired.