6H

6H or 6-H can refer to:


 * IATA code for Israir Airlines
 * Curtiss JN-6H
 * JN-6H Jenny; see Curtiss JN-4
 * Isuzu 6H Engine
 * 6H-SiC, one of the Polymorphs of silicon carbide
 * Hydrogen-6 (6H), an isotope of hydrogen
 * 6H, the production code for the 1983 Doctor Who serial Enlightenment