Window sash pivot parts

Thanks for posting. I believe this is an older version of the 15-180 Pivot Shoe, which uses Series 190 Coil Balances. For new coil springs you have to choose a spring weight for each, which denotes the weight an individual coil can support. If you're unsure what to pick, give me the exact weight of the window sash, and I can work it out for you. If your old coil support housing is undamaged you can reuse it, otherwise see the 15-181 and 15-182. Finally, see if your old pivot bar matches the 26-040. Let me know if you have further questions. 

Sure, the 540 option is one of the standard options available for the Series 190. If you haven't already, I highly recommend visiting the store page for each product I've recommended so far, which I linked to in my previous response.

As mentioned above, I think your pivot bar is a match for our 26-040. We have a video guide on how to remove rusted pivot bars that you may find helpful.

That's great news! Thanks so much for the update, and please don't hesitate to reach out if you had any follow up questions. We're always here to help.