K4

K4 or K-4 may refer to:

Military

• Daewoo K4, a South Korean automatic grenade launcher
• HMS K4, a 1915 British K class submarine
• K 4 or Norrland Dragoon Regiment, a Swedish Army cavalry regiment
• K-4 (SLBM), an Indian submarine-launched ballistic missile
• USS K-4 (SS-35), a 1914 United States Navy K-class submarine

Transport

• China Railway K3/4
• K-4 (Kansas highway), a highway in Kansas
• Kalitta Air, IATA code K4, an American cargo airline
• LNER Class K4, a British class of 2-6-0 steam locomotives
• London Buses route K4, a Transport for London contracted bus route
• PRR K4s or Pennsylvania Railroad Type K4, a class of American 4-6-2 steam locomotives

Other uses

• K4, a Security company
• K4, a four-man sprint kayak
• K4, a model of the British red telephone box
• K4, a normal modal logic
• K₄, in graph theory, the complete graph of four vertices
• K₄, in abstract algebra, the Klein four-group
• K4 (mountain) or Gasherbrum II, a mountain between China and Pakistan
• Kawai K4, a digital synthesizer made by Kawai Musical Instruments
• Koalisyon ng Katapatan at Karanasan sa Kinabukasan (K4, Coalition of Truth and Experience for Tomorrow), a Philippine political coalition
• K4 refers to Kryptos part 4, the last section of the cryptographic puzzle sculpture (currently unsolved)

See also

• KKKK (disambiguation)
• All pages with titles containing K-4
• All pages with titles containing K4