Window won't stay in

Thanks for reaching out to us. Our 15-087 looks to be what you need. This part is compatible with the S190 coil springs and 15-086 housing. Take a look at the specifications and see what you think. 

I'm not sure what that may mean. I wonder if you could be referring to the pivot bar. If that's the case, we would need to see a photo of yours removed from the window sash in order to identify it. 

Our 26-422 pivot bar comes to mind. This appears to be a good match. Have a look and see if our specifications align with what you need.

Alternate image for 26-422

Alternate image of 26-422

I'm happy to be of help. Good luck with the repair, I'll be here if you need anything else!