A connector formed of flexible plastic has a female socket at one end of an elongated flexible connection rod provided with two pivotal lock lugs positioned to face each other within a locking aperture and a male inserting head and a stopper at its opposite end which are inserted in the locking aperture; a flexible flange on the male inserting head engages the pivotal lock lugs during insertion and cannot be withdrawn following insertion; a bulbous stopper limits inward movement of the components in the female socket.