Window balance coil spring for an 11.5 pound vinyl window has broken in two at about the halfway point.
The spring is silver in color 0.75 inches in width and looks like it could be an S170. There are barely readable impressions on the tongue of the spring that appear to be 336 with a letter '"J" below them. This is a 1999 vintage window and the rest of the hardware matches your photos and the video.
Can you take a look and tell me if I am correct and advise me on the price for this part?
FYI, the windows were made by Certainteed.
