Attached you will find 2 items I am trying to find for windows. One item is the tabs used to hold the screen in place. They are so brittle I can not remove them without breaking them. The other item is the tabs used to tilt the window.
Well it fell Apart as I removed it. Here a a couple pics
If it helps, the clips that hold the screen in are actually attached to the screen. There is a small hole in the screen frame and the clip has a small probe/tab on it that snaps into the hole.