What type of screw is needed to attach the 8 in. x 4 in. Steel Dryer Vent Stucco Ready with Damper to stucco wall?

Self-tapping screws are used to install the dryer vent.

We used self-tapping screws pre-drilled a hole for the screw in the stucco, added caulk behind the metal plate, and filled the screw holes with some caulk before inserting the screw.