K41

K41 may refer to:
 * K-41 (Kansas highway)
 * K41 (nightclub) in Kyiv, Ukraine
 * HMS Sunflower (K41), a corvette of the Royal Navy
 * INS Nirbhik (K41), a corvette of the Indian Navy
 * Piano Concerto No. 4 (Mozart), by Wolfgang Amadeus Mozart
 * Potassium-41, an isotope of potassium
 * K41 (theory), Kolmogorov´s theory about turbulence