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.
References in periodicals archive ?
In 1978, Jerry and Loren Alberico, along with Connie Pierce, identified a need for hub rings for floppy disks in the computer industry and started a die-cutting business with two machines in a garage.