What is this part?

A quick learner from Swedesboro, NJ says:
I found it on top of the metal pivot shoe of my tilt in window. Is this a part of the pivot shoe? I noticed that on side of my upper sash is off that pivot shoe so is this a part of a broken pivot shoe? What might be the part number for this?
Thumbnail of the uploaded file named 20200914_164744.jpg
Profile picture of Tom
Tom from SWISCO responded:

It's really hard to say for sure what this is. It looks like just a hunk of plastic. It could be part of a pivot shoe like our 15-192, but you should probably look at an undamaged version on one of your other windows to be 100% sure.

SWISCO S170 and S171 Coil Balance Assembly
SWISCO S170 and S171 Coil Balance Assembly
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 >
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.