spring channel sash balance for aluminum window

Question

The spring balance is 17" long on the metal part. It is 0.55" wide and 0.62" deep.
The part number stamped on the front side is 1620Z

Do you have matching replacement parts I can buy?

Thanks,
Guy

User submitted photos of a window balance.

Tom · Accepted Answer

Hey, thanks for posting. I've narrowed this down to two possible channel balance Series: either our Series 351 or our Series 390 balances.

Now, as you can see, there is only one difference between these two Series, and that is their bottom shoe. The Series 351 uses the 15-002 while the Series 390 uses the 15-001. I can't quite tell what you have based on your pictures, though. Please carefully compare their dimensions to your own hardware and see which is a better match.

Comparison of 15-001 & 15-002