window tilt pin with the number 2651 stamped on it.
Paul from SWISCO responded:
October 25, 2019
There are a few variations that may work. You will need to know your dimensions to match it up. Note which hole you use for installation and take a look at 26-021, 26-433, 26-443, 26-444, 26-454. Let us know if any of these are a match.