That's what I call them and some tool suppliers refer to them by the same name. If you want print the pics and show them to be sure. Try your local Pep Boys, Auto Zone or any other auto parts store in your area for rental tools. Call them first and find out.

The rotor (commonly referred to as pressed-on rotor or floating rotor assembly) is connected to the hub assembly by the four screws. The hub assembly is pressed on the wheel-bearing hub, connected to end of axle.
When putting them back on, apply generous grease on the bearing housing and insert the hub back in place. Push it enough until the center hub stud is showing enough thread to put the nut back on. If properly situated (teeth all aligned) you should be able to slide it in easily. Sometimes, you'll need to hammer it back on for the thread to show, just remember to make sure the teeth are all aligned first. Use the same socket, used to removed the center hub nut, when hammering it back on. Never hammer on the hub itself and never use this method to force it back in place or you'll break something, it has to slide in easily. :naughty: :nono: When you tighten the nut, secure it by making a notch on the hub nut circumference, some might require a secure/locking pin.