Unknown diameter spiral spring

Quick Learner from Boston, ma

Hi. This is a photo of a spiral spring for a tilting double hung window. It is 21" long. It seems like the diameter is 1/2". The bottom piece looks blue but is more of a teal green.  Might you have a part that could work?

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Lauren
Lauren from SWISCO
SWISCO
Expert

Hello, thank you for posting,

For a tilt window application, you could either have the Series 600 with a 9/16" diameter (considered 5/8" in the trade) or the 3/8" diameter Series 900

Please double check the diameter, but being close to 1/2", you most likely have the Series 600. Please see the S600-21 with a blue tip that can support a 10-29 pound window sash. 

Let us know if you have any additional questions! 

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