End freewheel sprocket thread diameter

Someone has told me the Uniglide freewheel thread diameter under the end sprocket is the same as the thread diameter under the end sprocket of the Uniglide cassette. A rough measurement of a 14-28 5 speed uniglide freewheel mounted on the bike appears consistent. My Uniglide cassette wheels are at some relatives' place, so I'll need take something over there to confirm, or can someone else confirm that?