Or there is one or two manufacturers for all the various brands.

"Whirlpool brands include Whirlpool, Maytag, KitchenAid, Jenn-Air, Amana, Magic Chef, Admiral, Norge, Roper, and others. See all items in Dishwasher Dishrack. Whirlpool also makes various appliance models for Sears / Kenmore."

And once you start looking up part numbers you realize it goes even further.