Abstract: A releasable clasp for a necklace or the like wherein a rigid housing having an open end houses a tubular holder of flexible material with a transverse web having a hole therethrough adjacent the open housing end. Also included is a shaft of rigid material having an enlarged head at one end thereof which is sized so that the shaft head can pass through the hole in the web with the application of a predetermined joining force and can be withdrawn therefrom only upon application of a pre-established withdrawal force. The housing and holder together form a first clasp part, while the shaft constitutes a second clasp part. The shaft may be twisted to detent into a locking position.