F34, F-34 or F.34 may refer to:

F-34 tank gun, a gun used in the Soviet T-34 tank of World War II , a Nilgiri-class frigate of the Indian Navy decommissioned in 2005 , a United Kingdom Royal Navy destroyer which saw service during World War II , a United Kingdom Royal Navy anti-aircraft frigate which saw service during the 1950s BMW 3 Series Gran Turismo (F34) Firebaugh Airport (FAA LID F34) F-34, JP-8 jet fuel NATO designation Persistent mood (affective) disorders ICD-10 code