Need help identifying spring replacement for tilt window

A quick learner from Virginia says:
April 5, 2021
I have some tilt windows, and I need to replace all the hardware pieces. I'm stumped on the spring, the ones on there right now are double springs. The top of the spring assembly needs to be rounded/beveled/sloped to let the tilt catch pass over without breaking the plastic.

I pulled out one of the windows and it weighs 8 lbs 11.5 oz.

The current springs have a few markings:
#5.0 35"
PAT5232208
Thumbnail of the uploaded file named 20210405_191915.jpg
Thumbnail of the uploaded file named 20210405_191930.jpg
Thumbnail of the uploaded file named 20210405_191944.jpg
Thumbnail of the uploaded file named 20210405_192009.jpg
Thumbnail of the uploaded file named 20210405_192033.jpg
Profile picture of Bob
Bob from SWISCO responded:
April 7, 2021

This is a 15-199 Pivot Shoe, which uses either Series 160 1/2" thick springs or Series 165 3/8" thick springs. Please remove your old assembly and measure the spring thickness to confirm. See the video below.
Pivot Shoe, 17/32" Thick
Pivot Shoe, 17/32" Thick
15-199
$3.70
3/8" Coil Dual Support
3/8" Coil Dual Support
15-204
$1.88
4 lb Series 165 Egress Coil Balance
4 lb Series 165 Egress Coil Balance
S165-4
$4.70
How to Replace a Triple Coil Balance System
How to Replace a Triple Coil Balance System
VIDEO
WATCH >
How to remove window pivot shoes
How to remove window pivot shoes
VIDEO
WATCH >
Anatomy of a tilt window
Anatomy of a tilt window
VIDEO
WATCH >
How to replace a window coil balance
How to replace a window coil balance
VIDEO
WATCH >
Removing a Triple Coil Window Balance
Removing a Triple Coil Window Balance
GUIDE
READ >
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 3-4 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.