Looking for these winfow parts

Quick Learner from Trenton, NJ

Oct 6, 2023 9:33 pm

These parts are 29 inches in length.

1 has the number 2840, the other has 28 C. I am guessing they are slightly different for the upper & lower sash?

Do you have these available and how much are they?

1 user uploaded image

4 Replies

Lauren from SWISCO

Oct 9, 2023 10:09 am

Hello, thank you for posting,

To further review, we will need to see closer images of the top and bottom nylon attachments. From there we can narrow down to determine the Series your window uses.

For the stamps, is the 2840 and 28C from the top and bottom sashes? The balances should have the same stamp for either side of the sash, but can differ from top to bottom depending on the weight. Thank you!

Quick Learner from Trenton, NJ

Oct 9, 2023 11:24 am

Here are closer shots of the ends.

4 user uploaded images

Lauren from SWISCO

Oct 10, 2023 8:14 am

Thank you,

It appears you have either the S351-29, with a 15-002 bottom attachment, or S390-29, with a 15-001 bottom attachment. Take a look at the image below to determine which balance you'll need.

A 2840 stamp can support a 23 to 28 lb pound sash. The 28C stamp should translate to a 2830 stamp and can support a 16 to 23 lb pound sash. I recommend weighing the sashes to confirm the best option. The balance should have the same stamp on either side of the sash, but could differ between top and bottom sashes.

Please review and let me know if you have any additional questions!

Comparison of the S351 and S390 balance shoes.