I recently took apart a HDD and found this board-to-board connector that's used to attach the controller PCB to the stepper motor PCB underneath simply through "spring" contacts.
I'm trying to figure what this connector type is called so that I can buy it on Mouser or Digikey. The pitch of the connector in the photo is 0.05inch. I would need either 0.05inch or 1mm pitch connectors of this type for my purposes.