A short plastic or metal cone used to align a 5.25" floppy disk to the drive spindle. It is inserted into the diskette's center hole when the drive door is closed.
"centering cone." YourDictionary, n.d. Web. 19 May 2018. <http://www.yourdictionary.com/centering-cone>.
centering cone. (n.d.). Retrieved May 19th, 2018, from http://www.yourdictionary.com/centering-cone