Dave Sr. from SWISCO responded:
January 20, 2016
The shoulder bolt and washer would go through the hole at the end of the link arm on the operator and mount onto the window linkage in the side of the window. As for what replacement hardware you need, if you can send us some photos of your operator along with its dimensions we can make a good recommendation. Also seeing how your operator is installed into the window frame would help. Finally, we have a video that may give you some further insight on what can work.
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