F4

F4, F.IV, F04, F 4, F.4 or F-4 may refer to:

==Aircraft== Flanders F.4, a 1910s British experimental military two-seat monoplane aircraft Martinsyde F.4 Buzzard, a British World War I fighter version of the Martinsyde Buzzard biplane Fokker F.IV, a 1921 Dutch airliner Caproni Vizzola F.4, an Italian prototype fighter of 1939 Lockheed F-4 Lightning, a reconnaissance variant of the Lockheed P-38 Lightning World War 2 fighter Fleetwings Sea Bird, a variant of which was the F-4 A number of aircraft that first entered service with the U.S. Navy: Curtiss F4C, a 1920s version of the Naval Aircraft Factory TS biplane fighter Boeing F4B, a 1930s version of the Boeing P-12 biplane fighter Grumman F4F Wildcat, a carrier-based fighter aircraft in World War 2 Vought F4U Corsair, a World War 2 fighter Douglas F4D Skyray, a carrier-based fighter/interceptor, first flight 1951 McDonnell Douglas F-4 Phantom II, a supersonic fighter-bomber, first flight 1958