Window springs

A quick learner from Chattanooga, Tn says:
November 14, 2016
This is also related to post d77871 this is a picture of the spring and the hardware which the window fits in. These windows are double hung but do not tilt. the spring is attached to the top of the window mount which is plastic. The coil slips over the top and the bottom is attached too the item in omg 0286. This allows the the window to slide up or down with the spring holding tension. what i need to know is if you have the springs like this and how to determine which ones i need as several windows are not staying closed.

Thanks you
User submitted photos of window hardware.
A quick learner from Chattanooga, Tn says:
November 15, 2016
The friction shoe #15-104 is very similar to what is in my window. one of the parts needed is close to the tilt pin #20-16 but mounts with two screws on the lower side of the window. Have not seen any springs like the ones in my window. Have not idea as to who made the window, the house was built in 2003
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Tom from SWISCO responded:
November 16, 2016
Thanks for contacting us. I agree, the 15-104 is the best match we have for the shoe, but we will not be able to replace the spring. I recommend contacting a local mill work that still makes wood windows, they should be able to help out.
Caradco Friction Shoe
Caradco Friction Shoe
15-104
$1.95
Tilt Pin
Tilt Pin
20-016
$0.90
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