Missing Thumb Screw

A home owner from Sacramento California says:
Missing thumb screw from Viking window
Thumbnail of the uploaded file named Window Thumb Screw.jpeg
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Emily from SWISCO responded:

Hello!

We, unfortunately, don't sell a match for the part shown here. The 91-179 comes to mind but it is still quite different and I can't promise it will work for you. Take a look at the specifications and see what you think. 

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