Yes. All mounting hardware included. Here are some pics. I included a pic of the part number just for reference.Yeah it's weird, so again sorry for the hassle. I have a Garmin Zumo 396, so I'm going to take a peek at it's mounting plate to make sure it looks similar to what will fit your model.
Mike, does your kit have all the mounting hardware with it? I ask only because your pic just shows 3 pieces. Thanks for your time.