244924 ⎘
Buckles, buttons, clasps, etc.; Separable-fastener or required component thereof [e.g., projection and cavity to complete interlock] including member having distinct formations and mating member selectively interlocking therewith; Projection having movable connection between components thereof or variable configuration including resiliently biased projection component or surface segment forming total external surface of projection and encircling hollow central area having dome-shaped head and expansion slit along side