Pivot bars

Thanks for posting, and thanks for the detailed info. We don't have an exact match for this pivot bar; I believe our closest is the 26-030. It's a bit longer, but the overall length of a pivot bar is usually irrelevant, since there's plenty of room in the sash frame. The hole spacing isn't quite what you measure, but the holes on this pivot bar are a bit elongated to allow for some extra room. Take a look and see if you think this pivot bar might work for you.

Detail of 26-030