Can't find the part required

Hello there!

Our 15-087 pivot shoe looks like a better match for what you have here. This part is designed to be used with the Series 180 coil springs. We also sell the 16-024 mounting bracket. Take a look at the specifications and see how they align with yours.

Detail of 15-087

There should be a stamped code on the band of the spring that will indicate what weight is needed. If there aren't any, you will have to divide the sash weight by the total number of springs in the window. 

I agree! One S180-5 5-pound spring on each side of the window will total 10 pounds of overall support which should be fine as long as the coil weights are within a pound of your sash's actual weight. 

You got it! Thank you for your order! Please let me know if I can be of further help and best of luck with the repair!