H6, H06, or H-6 may refer to:

Science

British NVC community H6 NVC community H6 (''Erica vagans - Ulex europaeus'' heath) is one of the Heaths in the British National Vegetation Classification system, heath Terminology used in connection with the British National Vegetation Classification, communities in the ...

, an ecological designation * Sanguiin H-6, a dimeric ellagitannin found in ''Sanguisorba officinalis'', the great burnet * Hydrogen-6 (H-6 or ⁶H), an isotope of hydrogen

Transportation

Aircraft

* Hughes OH-6 Cayuse, a 1963 American scout helicopter ** MD Helicopters MH-6 Little Bird, a special forces variant *

Xian H-6 The Xian H-6 () is a twin-engine jet bomber of the Chinese People's Liberation Army Air Force (PLAAF). The H-6 is a license-built version of the Soviet Tupolev Tu-16 and remains the primary bomber aircraft of the People's Republic of China. D ...

, a Chinese bomber * Besson H-6, a French flying boat *

Sikorsky R-6 The Sikorsky R-6 is an American light two-seat helicopter of the 1940s. In Royal Air Force and Royal Navy service, it was named the Hoverfly II. Development The R-6/Hoverfly II was developed to improve on the successful Sikorsky R-4. In order to ...

, a 1943 American helicopter

Watercraft

* HMS ''H6'', a British submarine * USS ''H-6'' (SS-149), a United States submarine * HMS ''Hurricane'' (H06), a British ''Havant''-class destroyer * HMS ''Keith'' (H06), a British B-class destroyer

Other vehicles

PRR H6 The Pennsylvania Railroad's class H6, H6a, and H6b steam locomotives were of the 2-8-0 "Consolidation" freight type, the most numerous class on the railroad with 1,707 units and the second most prolific 2-8-0 class in North America, with the USATC ...

, a steam locomotive *

Haval H6 The Haval H6 is a compact crossover SUV produced by the Chinese manufacturer Great Wall Motor under the Haval marque since 2011. It was introduced at the 2011 Shanghai Auto Show, and it is a crossover, produced with both front-wheel-drive and fo ...

, a compact crossover SUV produced by Great Wall Motor *

Hispano-Suiza H6 The Hispano-Suiza H6 is a luxury car that was produced by Hispano-Suiza, mostly in France. Introduced at the 1919 Paris Motor Show,Ultimatecarpage.com – Hispano Suiza H6C Monza the H6 was produced until 1933. Roughly 2,350 H6, H6B, and H6C car ...

, an automobile

Roads

* H6 Childs Way, a road in England * Highway H06, a road in the Ukraine

Other uses

* , level 6 heading markup for HTML Web pages, see HTML element#heading *

Flat-six engine A flat-six engine, also known as a horizontally opposed-six, is a six-cylinder piston engine with three cylinders on each side of a central crankshaft. The most common type of flat-six engine is the boxer-six engine, where each pair of opposed cy ...

, sometimes marketed as H6 * '' Halloween: The Curse of Michael Myers'', the sixth film in the ''Halloween'' franchise * '' H6: Diary of a Serial Killer'', a movie *

Composition H6 __NOTOC__ Composition H6 is a castable military explosive mixture composed of the following percentages by weight: * 44.0% RDX * 29.5% TNT * 21.0% powdered aluminium * 5.0% paraffin wax as a phlegmatizing agent. * 0.5% calcium chloride H6 i ...

, an explosive * H6, a watch possibly made by

John Harrison John Harrison ( – 24 March 1776) was a self-educated English carpenter and clockmaker who invented the marine chronometer, a long-sought-after device for solving the problem of calculating longitude while at sea. Harrison's solution revol ...