What is this part?

A professional from Macon MO says:
September 26, 2023
All I know is the customer stated it's used to hold the spring for a window. The window in question is several decades old.
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Casey from SWISCO responded:
September 27, 2023

Hello,

I can't be sure but it sounds like you may be looking for a type of window balance or an accessory used with it. We may be able to help but we would need to see photos of the part that the customer needs to compare to our inventory. Thank you. 
A professional from Macon MO says:
September 27, 2023
I believe it's part of a window balance as well. He sent more pictures of the window itself but I'm not sure how much information it will provide.
Thumbnail of the uploaded file named windowpart5.jpg
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Casey from SWISCO responded:
September 27, 2023

It's tough to make out the details of the top sash guide shown in your last photo but it does remind me of the 18-091. Take a look and compare the specifications below to determine if this could be the part needed for your customer's repair. 

Detail of 18-091
Detail of 18-091

Alternate view of 18-091
Alternate view of 18-091
1" Top Sash Guide, Kawneer
1" Top Sash Guide, Kawneer
18-091
$1.70
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