hub ring

hub ring

[′həb ‚riŋ] (computer science) A thin plastic ring placed around the center hole of a floppy disk to prevent the disk from warping and damaging its contents if it is improperly inserted in a disk drive.

hub ring

A flat ring pressed around the hole in a 5.25" floppy disk for rigidity. The drive's clamping ring presses the hub ring onto the spindle.