9K may refer to: 9000 (number), the natural number following 8999 and preceding 9001 Gnome-Rhône 9K, a 9-cylinder 550 hp (405 kW) air-cooled radial engine Cape Air IATA airline designator Kuwait aircraft registration code Kampfgeschwader 51, from its historic Geschwaderkennung code with the Luftwaffe in World War II NY 9K, see New York State Route 9N Soyuz 9K, see Soyuz-B Yak 9K, see Yakovlev Yak-9 9K, a model of SNECMA Atar Typ 9K, a model of SEAT Inca GCR Class 9K, a class of British 4-4-2T steam locomotive See also K9 (disambiguation)