Re pivot lock screws #15-208
Thanks for reaching out to us. The 15-208 isn't designed to use coil springs. This pivot shoe is used with channel balances, not coil balances. I wonder if you have the wrong part. Would it be possible for us to see a photo of the old pivot shoe, preferably removed from the window?
Great, thank you! Your old pivot shoe looks like a match for the 15-177. This is designed to use the Series 152 coil springs which attach to the side of the pivot shoe using a screw like the 33-072 (sold separately).
If you need new coil supports, see the 15-143, 15-144, and 15-145. These "sandwich" around each spring.
You can indeed return the part you ordered. Our return policy can be found here.