M class

M class or M-class may refer to:

Military

 * M-class cruiser, a planned German light cruiser class
 * M-class destroyer, several classes of destroyer
 * Admiralty M-class destroyer, a class of British destroyers built 1913–1916 and served in World War I
 * M-class, British destroyers starting with the letter M of the L and M-class destroyer, launched 1939–1942 and served in World War II
 * Marcílio Dias-class destroyer, Brazilian destroyers built during World War II
 * Karel Doorman-class frigate, of the Royal Netherlands Navy
 * M-class minesweeper, several classes of minesweeper
 * M-class minesweeper (Germany), a class of minesweepers of the World War II German Kriegsmarine
 * M-class minesweeper (Netherlands), a class of minesweepers of the Royal Netherlands Navy built after World War I
 * Abercrombie-class monitor, a British WWI class of monitor gunships
 * M-class submarine, several classes of submarine
 * British M-class submarine
 * United States M-class submarine

Transportation

 * Mercedes-Benz M-Class, an automobile
 * M-segment, a European vehicle size class
 * NZR M class locomotives
 * Pennsylvania Railroad class M1, locomotives
 * Victorian Railways M class, steam locomotives
 * Victorian Railways M class (diesel-hydraulic), shunting locomotives
 * OOCL M-class container ship, a class of large container ships operated by Orient Overseas Container Line
 * Maersk M-class container ship, a class of large container ships operated by Maersk Line
 * M-class Melbourne tram
 * M-class Sydney tram

Astronomy

 * M class, a stellar classification
 * M class, a class of solar flare