This Ferrari 3 MM Plate PM1041FE25B has a H3 and B104 stamped into the top.  

Must use with Ferrari hinges.

The only screw that comes with this hinge is the one showing that is used to attach the hinge.

3 mm is not something that can be measured.

This Ferrari 3 MM Plate PM1041FE25B is a very common plate that is used on frameless cabinets.  For kitchens and other cabinets, this ferrari hinge must be used with screw on hinges.  The screw on the plate is for attaching the hinge.