Plastic part shown in the picture at the bottom corner of the sash

A home owner from Locust Grove, GA 30248 says:
June 8, 2021
I removed the lower sash on one of my windows to have the broken glass replaced. I noticed there are missing plastic (or nylon) pieces (shown in the picture of another like/same sash).
A metal rectangular piece attached to the bottom of the sash at each corner fits into the missing piece.
Thumbnail of the uploaded file named 5804AB75-5648-4D6F-AAB8-78F1F4B3164A.jpeg
Thumbnail of the uploaded file named 96725660-8F3C-4DA1-B47F-9E11815F6054.jpeg
Profile picture of Bob
Bob from SWISCO responded:
June 14, 2021

Hello there. I believe this is our Series 900 Spiral Balance, which has an outer tube diameter of 3/8". For the pivot shoe, see if our 15-045 matches up; for the pivot bar, give the 26-041 a look. 
Pivot Shoe, 3/8" Thick
Pivot Shoe, 3/8" Thick
15-045
$1.85
2" Pivot Bar, Keller
2" Pivot Bar, Keller
26-041
$2.35
How to replace a tilt window spiral balance.
How to replace a tilt window spiral balance.
VIDEO
WATCH >
How to Remove a Pivot Shoe (Cutout Method)
How to Remove a Pivot Shoe (Cutout Method)
VIDEO
WATCH >
Swisco's 15-045 Pivot Lock Shoe
Swisco's 15-045 Pivot Lock Shoe
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 >
Removing Rusted Pivot Bars
Removing Rusted Pivot Bars
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.