Bathroom window spring replacement
Thanks for writing in. Your pivot shoe appears to be the 15-180 coil balance shoe. Look over the dimensions for the shoe below and compare them to your existing shoe. See if these are the right fit for your window.
These are typically used along with the Series 190 coil springs. To confirm the exact spring needed for your window, you'll need to confirm the stamp on the metal coil spring. If there is no stamp, you'll need to take the exact weight of the window and divide it by the total number of coils.
Your support clip appears to be our coil balance clip, part 15-186. You may also need the bushing coil as well, which is part 15-182.
You can either choose to use the S190-440 or the S180-540. So long as the spring strength is within 1lb +/- of the window weight, the windows should continue to function properly.
You'll just need to be sure to use two of the same coil. Mismatched coils can cause one side of the coil assembly to wear out faster than the other due to the uneven spring strength.
I'm happy to hear that your parts arrived to you and that the installation was fairly quick.
Feel free to reach out to us for any future hardware repair projects.
Have a great day!