Replacement window parts
Hi there!
This looks like our 15-177 pivot shoe to me. The Series 152 coil springs are designed to work with this. I recommend you look over the specifications to ensure they match what you need.
I recommend taking a look at the band of the coil spring for a stamped number. If there aren't any, get back to me with the exact sash weight and I'll be able to calculate what you need from there.
The sash is between 15.2 and 15.8 lbs.
I weighed it multiple times holding it using my bathroom scale then subtracting my weight. But never the same twice! Is that close enough?
Thanks for getting back to me! If you wanted to stick with the double coil setup you have now, you can use (2) S152-4 4-pound springs on both sides of the window. This would total 16 pounds of overall support which should be fine as long as the coil weights are within a pound of the sash's actual weight.
Is there another way to do it? Can we speak over the phone?
I'm afraid our department doesn't use phones. We can only respond right here on this page, unfortunately.
We don't sell your coil springs with curved ends, unfortunately. The Series 152 springs will still work with the 15-177 though. The springs are attached to the side of the shoe with a screw instead of hooking onto it.