Replacement window springs UB 28C marking on springs. 28" length channel

A quick learner from Pinellas Park Florida says:
The only markings I have are on the outside of the channel UB 28C. The spring dimension is 14" body length x 1/2" diameter
Profile picture of Emily
Emily from SWISCO responded:

Hello!

We'd be happy to help but we'll need you to remove an undamaged balance with the end fittings intact to compare to our inventory.

Thank you!

A quick learner from Pinellas Park Florida says:
These are photos from a non broken window spring
Thumbnail of the uploaded file named 185A3F36-522D-4327-86BC-E79CB5E50E0B.jpeg
Thumbnail of the uploaded file named 54909FE2-448F-41F3-8162-E1A5B5678A03.jpeg
Thumbnail of the uploaded file named 110262DE-BA1A-4F46-9DD1-2F6E7B03D4D6.jpeg
Thumbnail of the uploaded file named 8D66C2EF-BC7C-4158-872A-BA79F44B900C.jpeg
Profile picture of Emily
Emily from SWISCO responded:

Thanks for the additional pictures!

With this combination of fittings, you could have either an S380-29 or S385-29 channel balance. You’ll need to measure as shown below. The Series 380 has a 1" bottom fitting, and the Series 385 has a 1-3/32" fitting. A stamp of 28C usually corresponds to our 2830 option, but you can always weigh your sash on a scale to confirm.

Let me know if you have any questions! 

Comparison of the S380 and S385 balance shoes.
Comparison of the S380 and S385 balance shoes.
A quick learner from Pinellas Park Florida says:
Mine measures just shy of 1", more like 15/16". Would the 1" end fitting work in this case?
Thumbnail of the uploaded file named image.jpg
Thumbnail of the uploaded file named image.jpg
Profile picture of Emily
Emily from SWISCO responded:

It's possible that you might need balances with our 15-029 shoe attached. This has a depth of 7/8". If this is indeed the case, this is not a stock item but we can provide it for you via custom order. 

It's also possible that your shoe may have worn down over time. Can you confirm the exact depth of your bottom shoe? You may want to check the balance on the other side of the window or from an identical window to be certain. 

Let me know what you find and we can work from there.

A quick learner from Pinellas Park Florida says:
I ended up ordering the 1" bottom shoe, thinking that perhaps it has worn like you said.
Profile picture of Emily
Emily from SWISCO responded:

Gotcha! If it's over 7/8", your shoe has most likely just worn down. Let me know how everything works out and good luck with your repair! 

How to Identify Replacement Channel Balances
How to Identify Replacement Channel Balances
VIDEO
WATCH >
How to Replace a Non-Tilt Channel Balance
How to Replace a Non-Tilt Channel Balance
VIDEO
WATCH >
How to Repair a Jammed Window
How to Repair a Jammed Window
VIDEO
WATCH >
How to Replace a Channel Balance Attachment
How to Replace a Channel Balance Attachment
VIDEO
WATCH >
How to replace a channel balance
How to replace a channel balance
GUIDE
READ >
Reply to Thread
Use this form to ask a follow-up question or to share your experience regarding this subject.
(your email address will be kept private and is only used to inform you when a response has been made)
Current wait time is 4-7 business days
We promise that one of our experts will personally get back to you as soon as they are able. Thank you very much for your patience and understanding. If your inquiry is time-sensitive, please feel free to reach us at (888) 991-1929 or at help@swisco.com.