Grommet. SEAT CUSHION. A rubber ring with a hole in the center which provides protection through which Seat Cushion Pad related components pass through. A rubber ring with a hole in the center which provides protection through which Seat Cushion related components pass through. Clip that fastens seat cushion to seat frame. Seat Frame Clip. Seat Frame Grommet. Clip. cover. Foam. Pad. rivet. Sleeve.