K43

K43 may refer to:
 * K-43 (Kansas highway)
 * K-43 truck, an American military truck
 * INS Nishank (K43), a corvette of the Indian Navy
 * Junkers K 43, a German transport aircraft
 * Karabiner 43, a German rifle
 * Potassium-43, an isotope of potassium
 * SOVIET SUBMARINE K-43
 * Symphony No. 6 (Mozart), by Wolfgang Amadeus Mozart
 * Unionville Municipal Airport, in Putnam County, Missouri