Left.W/O SPORT SEAT. Pivot grommet. Right.W/O SPORT SEAT. WAGON. A component which cushions noise, friction or movement for the Seat Back Frame. A cylindrical insert that fits between the Seat Back Frame and another component. A protective sleeve which provides a cushion between the Seat Hinge and it's mounting surface. Seat Back Frame Grommet. Back. Hinge. Pivot bracket.