K3

K3, K03 or K-3 may refer to:

Transportation

• K-3 (Kansas highway), a state highway in Kansas
• London Buses route K3
• Taquan Air, IATA airline designator for the Alaskan commuter airline

Vehicles

• LNER Class K3, a steam locomotive
• GSWRI Class K3, a Great Southern and Western Railwa Irish steam locomotive
• Soviet submarine K-3 Leninsky Komsomol, the first Soviet nuclear submarine
• USS K-3 (SS-34), a 1914 United States Navy K-class submarine
• HMS K3, a 1916 British K class submarine
• HMS Heliotrope (K03), a 1940 British Navy Flower class corvette

Weapons

• K-3 (rifle), an Armenian-made bullpup rifle
• Daewoo K3, a light machine gun

Material

• K3 carbon, a carbon material used for making of items of high strength to weight ratio (such as bicycle frames & bicycle forks)

Items

• YP-K3, a brand of MP3 player by Samsung
• Larcum Kendall maritime chronometer

Media

• K3 (band), a Belgian/Dutch girl group
• K3 (television), a Catalan television channel
• K3 (band), also known as K3 Sisters Band- a 7 person pop/southern rock band out of Texas, USA fronted by sisters Kaylen, Kelsey & Kristen Kassab

Other

• K3 League, a Korean football league
• K3 (programming language), the third version of the k programming language created by Arthur Whitney
• K3 surface, a compact complex surface in mathematics
• Menadione, vitamin K₃
• Broad Peak, a mountain previously called K3

K3 Airbase near Pohang, Republic of Korea

• K3 incense, a herbal mix that is meant to be smoked for recreational purposes
• K3 Sisters Band, a 7 person pre-teen pop music group fronted by sisters Kaylen, Kelsey & Kristen Kassab of Texas, USA