F23

F23 or F-23 may refer to:

  • Fluorine-23 (23F), an isotope of fluorine
  • Funk F-23, an American agricultural aircraft
  • Getrag F23 transmission, an Italian 5-speed manual transmission
  • Hirth F-23, an aircraft engine
  • HMS Kanimbla (F23), a passenger ship requisitioned for the Royal Navy
  • HMS Teazer (F23), a T-class destroyer of the Royal Navy
  • Northrop YF-23, an American prototype fighter aircraft
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