We have just moved into a new home with a few windows needing replacement parts. I have identified one part (I believe) as Pivot Bar 26-021. All dimensions match except mine has three holes where your part has two.
I am unable to locate the other part and am hopeful you can assist.
The plastic piece in the photos appears to connect a spring to the cords to keep tension on the cords when the window moves up or down.
The windows were in the home when we purchased it so we do not have manufacturer information. The only number I could locate is on the light weight metal frame that covers this part and the string which is marked 3000.
Hope you can help.
Larry
