Millgard Awning style window connection clip

A handy person from Maui, Hawaii says:
Items have numbers on them 31878 and 31879. They are a clip assembly that connects the opening hinge assembly to the base of the opening section of the window. The window is a Millgard Awning style vinyl window purchased in 2007 or 2008.
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Bob from SWISCO responded:

Thanks for posting. See our 39-536 and 39-558. See if these are the parts you need. 

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