A device for securing a panel to a mounting stud with external teeth. An annular first body has an inner periphery, a plurality of lock fingers extending from the inner periphery, and a plurality of stop fingers extending from the inner periphery and circumferentially spaced from the plurality of lock fingers. An annular second body has a center opening, a plurality of lock openings spaced from the center opening for receiving the plurality of lock fingers to lock the first and second bodies together, and a plurality of legs extending inwardly overlying the center opening for engaging external teeth on the mounting stud.