IH Duplex Hopper Spur Gear Covering Plate.
Case IH part numbers: R17110, RA7037.
Fits the following International Harvester (IHC) McCormick planters with Duplex Hoppers:
Cub-173A, Cub-174A, 184, 34-221, 4M-21, F251, 251, F281, FTC251, 40, 44, 44A, 60, 440-46, FA74, FA75, 184, 284, 185, 186, 188, 187, 486, 488, 489, 686, 688, 689, 466, 66, 54, and 251 planters both tractor mounted and pull behind style.