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Dave Sr. from SWISCO responded:
August 1, 2016
Your windows could have settled with age. I don't believe these type hinges have an adjustment nut like you mention. You could try shifting the hinge by sliding to the left or right to help square up the sash, or you could possibly add a thin shim under the hinge to raise the sash up. As for picking out a left or right hinge, your best bet is to remove yours from the window and compare it to our pictures. Trying to figure out left from right in this industry is surprisingly tricky to answer. Some companies view the window from the exterior and some from the interior, so there's no universal method aside from simply comparing the obvious physical details.
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