073550-000FB is the F202 hub gear for Ameridrives Amerigear gear couplings, functioning as the hub half of the coupling that accepts a mating sleeve to transmit torque between shafts. The bore is 1.4375 inches with a standard keyway, designed for keyed shafts. In Ameridrives' catalog references, this part is listed as F202 C/F HUB RSB, confirming its role as the hub in the F202 family.
