M6

M6 or M-6 may refer to:

In roads:
* M6, a motorway-grade section of the N6 Dublin to Galway road in the Republic of Ireland
* M-6 (Michigan highway), a state highway in the Grand Rapids, Michigan area
* M6 motorway, a motorway in the United Kingdom
* M6 motorway (Hungary), a motorway in Hungary
* M6 Toll, a toll motorway in the United Kingdom that relieves traffic on the M6 motorway
* Russian route M6 is another name for the Caspian Highway in Russia

In entertainment:
* M6 (television channel), a television station in France

In science:
* Messier 6 (M6), an open star cluster in the constellation Scorpius

In automobiles:
* BMW M6, a 1983 high-performance version of the BMW 6 Series coupé
* M6 Presto-Matic, a semi-automatic transmission made by Chrysler

In hardware:
* M6 ISO metric screw thread

In photography:
* Leica M6, a rangefinder camera once popular among photojournalists.

In military equipment:
* M6 Aircrew Survival Weapon, a survival rifle for aircraft pilots
* M6 bayonet, a bayonet for the M14 rifle
* M6 Linebacker, an anti-aircraft variant of the M2 Bradley infantry fighting vehicle
* M6 Heavy Tank A world war two heavy tank design that never entered full production.In computers:
* M6 (cipher), a block cipher used by Digital Transmission Content Protection

In aviation:
* Miles M.6 Hawcon, a 1930s British experimental monoplane
* Amerijet International (IATA airline designator: M6), a cargo airline based in the United States

In electronics:
* M6, a BBC peak programme meter standard used for measuring the volume of audio broadcasts
* M6 miniPlayer, a Meizu Chines flash-based portable media player

M06 may refer to :
* BMW M30, a 1968 2.5 L-2.8 L straight-6 engine
* Havre de Grace Seaplane Base FAA LID