Exacta to Nikon F adapter??

Was one ever made?

There was never an adapter for hanging lenses in Exakta mount in front of a Nikon. It makes no sense. Exakta register is shorter than Nikon register.

I've hung one lens in Exakta mount in front of a Nikon. 135/2.8 Steinheil Auto Makro Quinar. I used two Novoflex adapters, LEIEX and NIKLEI-K, each 6 mm +/- thick. The lens as adapted's far focusing distance was ~ 1m. Fine for closeup work, otherwise useless.

If you want to use lenses in Exakta mount (why?) get an Exakta or Topcon RE body. Forget the Exakta body, get a Topcon.

I must disagree with Dan in part. Such adapters exist and can be purchased new today:
Dead Link Removed

The reason why I only disagree "in part" is that in order to allow focus to infinity, the adapter includes a 1.4x teleconverter of mediocre quality. So except for novelty, there's little to be gained by using such an adapter. With some Fotodiox adapters, you can remove the teleconverter. Then the adapter acts like a short extension tube and you lose the ability to focus to infinity. So unless you have a very special Exakta mount lens and you want to use it at short distances, I can't see it being worth even the modest cost.

Too thick - use Canon fd (there was a factory fd adapter)