General question regarding drum brakes, rotors, and hubs 71 valiant

does hub mean brake drum ?

in that case, yeah, you got a drum that has been on this car for what, 20-30 years?
makes sense it was tight
but, it should not be, so once you put it back together it is loose like it should be

i wouldnt worry about
Here is a pic to show what I am referring to._IGP4003.JPG
I understood that those two objects were supposed to be firmly pressed together with the wheel studs, but if it's ok if the hub can come off the drum then I am relieved. This car needs to be running sooner rather than later because the new semester is coming.