K51

K-51 or K51 may refer to:


 * K-51 (Kansas highway)
 * HMS Rockrose (K51), a corvette of the Royal Navy
 * Junkers K 51, a German aircraft design study
 * La finta semplice, by Wolfgang Amadeus Mozart
 * Potassium-51, an isotope of potassium
 * RUSSIAN SUBMARINE Verkhoturye
 * SOVIET SUBMARINE K-51
 * Toyota K51 transmission