latch plate

escutcheon

key plate, escutcheon, 1 1. A protective plate surrounding the keyhole of a door, a light switch, etc.; also called a scutcheon. 2. A flange on a pipe, used to cover a hole in a floor through which the pipe passes. 3. A protective or ornamental cover at the termination of a post, picket, or rail against a tread, floor, or wall.