A home owner from Waltham, Mass says:
June 28, 2016
I broke the sashstop that's located on the left side of the interior frame. It stops the window from opening more than a few inches. The windows were installed in 1998. Hope you can help me find the part.
Tom from SWISCO responded:
June 30, 2016
Hello, AnnMarie. This looks a lot like our 26-148 vent lock. Check it out and tell me what you think.