Patent attributes
An improved one-piece fastener for retaining a loop shank button in the buttonhole of a garment. The fastener is in the form of a planar disk having a solid margin and a central portion within the margin that is notched to define a pair of mutually parallel deflectable legs sized and spaced to permit their partial insertion through the loop shank of the button. The legs of the fastener are contoured to define a detent position in which the loop shank seats to securely attach the fastener to the loop shank and thereby retain the loop shank button in the buttonhole of the garment. One longitudinal end of the fastener margin is provided with an extension or tab by which a user can conveniently grasp the fastener during its installation and removal.