Silverline Window Broken Part Identification

A home owner from Indiana says:
May 28, 2021
I have several 400 Series Silverline windows (crank) where the middle black piece that attaches the arms to the window are broken. It makes opening and closing the window difficult. The crank arms fall off the track. What is this black middle piece called?
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Thumbnail of the uploaded file named part.jpg
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Bob from SWISCO responded:
June 2, 2021

That nylon piece might be part of a bracket like our 39-340 or 39-424. These are used along with our 39-393, which looks fairly similar to yours. Please compare to confirm. 
Roto Vinyl Awning Window Operator
Roto Vinyl Awning Window Operator
39-393
$47.95
Roto Awning Bracket, Surface Mount
Roto Awning Bracket, Surface Mount
39-340
$12.97
Roto Awning Bracket, Face Mount
Roto Awning Bracket, Face Mount
39-424
$12.97
Roto Folding Crank Handle, 11/32"
Roto Folding Crank Handle, 11/32"
39-232
$10.80
How to identify casement and awning operators
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