This is a servo mount for the Point Grey Flea2 and Chameleon Cameras. These cameras are fairly popular for robotics since they have a global shutter which is often critical for machine vision tasks.
Designed for HiTec HS-325HB Servo. The mounting plate can be connected to the servo using M1.6 screws or M2x6mm screws with nuts. You could probably modify the design to work with imperial sizes if you wanted to.