Hard disk drive multiple contact disk clamp

A disk clamp part for a hard disk drive, the disk clamp configured to clamp disk media to a spindle, the disk clamp comprising:

• a bottom side and a top side, and
• multiple protrusions extending from a surface of the bottom side and configured to contact a disk medium at multiple respective contact positions of the disk medium in response to application of a clamping load;
• wherein:
• each of the multiple protrusions comprises an annular protrusion circumscribing a hub of the disk clamp, and
• the multiple protrusions comprise an inner annular protrusion having a first center height and an outer annular protrusion having a second center height greater than the first center height.

A method for coupling disk media to a spindle, the method comprising:

• positioning the disk media onto the spindle with disk spacers interleaved therebetween;
• positioning a disk clamp over a top disk medium, wherein the disk clamp comprises multiple protrusions extending from a bottom side, wherein:
• each of the multiple protrusions comprises an annular protrusion circumscribing a hub of the disk clamp, and
• the multiple protrusions consist of an inner annular protrusion having a first center height and an outer annular protrusion having a second center height greater than the first center height;
• and
• fastening the disk clamp to the spindle thereby forcing the multiple protrusions to contact the top disk medium to apply a clamping load at multiple respective contact positions of the top disk medium.