Hello, I am looking for this window part. It is from a vertical sliding window pane, circa 1991. The forked/square protrusion fits inside the frame itself. The hole accepts a screw that attaches the top part of the aluminum frame to the sides. The round protrusion serves as a guide to keep the window in the track. Can you locate it? I would like to order a dozen or so.
Thank you, Denise
