Troy Bilt Tiller Nylon Washer part# 9945 supersedes to part# GW-9945. These washers are used to seal the bolt heads on the tiller tine shaft cover of Horse and other model tillers. Some of the model numbers are listed here, 10056, 2215-2228, HorseIII (6,7, and 8hp models) and Horse OPC tillers. Price is per each washer.