F5

F5, F.V, F 5, F05, F-5 may refer to:

Science and technology:

• F5 Networks, a manufacturer of network equipment
• Nikon F5, a camera
• Faugère F5 algorithm, an algorithm for computing the Gröbner basis of an ideal of a multivariate polynomial ring
• Factor V, a protein of the coagulation system
• F5, a function key on a computer keyboard

Aircraft:

• Caproni Trento F-5, a jet aircraft of the 1950s
• Caproni Vizzola F.5, an Italian fighter aircraft of 1939
• Northrop F-5, a 1960s US jet fighter
• F-5 Lightning, a photo-reconnaissance version of the Lockheed P-38 Lightning
• Felixstowe F.5, a 1918 British flying boat
• Fokker F.V, a 1922 Dutch aircraft
• Shenyang F-5, a version of the Chinese Shenyang J-5 jet fighter

Other:

• F-5 Facebuster, a professional wrestling throw popularized by Brock Lesnar
• F5 (band), a rock band
• F 5 Ljungbyhed, a Swedish Air Force training wing
• F-05 (Michigan county highway)
• F5 tornado, the highest intensity rating on the Fujita scale indicating an extremely violent tornado
• F05 section of ICD-10 Chapter V: Mental and behavioural disorders code
• Factsheet Five, a magazine sometimes referred as F5
• Cosmic Air (IATA airline designator)
• Sydney Ferries' Inner Harbour ferry services, known as the F5