replacement coil balance springs

A quick learner from Fernandina Beach says:
Windows have dual coil balance springs on each side of window.
Upper coil spring is labeled 440 and lower coil spring is labeled 540
Width of spring is 1/2 inch
Weight of window is 23.4 pounds
Springs are 25 years old.
All other parts work properly, tilt window shoe locks etc.
Springs are held to shoe locks by part 33-073 screw.

Which coil springs do I need to order?
Concern is the 440 S190 and 540 S190 springs appear to be 1 inch wide versus the slot just fitting a 1/2 inch wide spring.

Profile picture of Paul
Paul from SWISCO responded:
Hello there! It sounds like you need both our S190-440 and S190-540 coil springs. I have also placed a list on the upper right hand side of this page of the related items that would go with the coil springs. Look over the list for any additional items you may need.
Reply to Thread
Use this form to ask a follow-up question or to share your experience regarding this subject.
(your email address will be kept private and is only used to inform you when a response has been made)
Current wait time is 4-7 business days
We promise that one of our experts will personally get back to you as soon as they are able. Thank you very much for your patience and understanding. If your inquiry is time-sensitive, please feel free to reach us at (888) 991-1929 or at help@swisco.com.