M3 screw, a metric screw

37 mm Gun M3, a light American anti-tank gun

BMW M3, a high performance luxury car

M3 motorway, a proposed motorway that would be an upgrade of the N3 road in the Republic of Ireland

M3, a United States snowboard manufacturer

M3 Stuart tank, an American light tank

M3 Bradley, an American infantry fighting vehicles

3M Company (NYSE: MMM), formerly Minnesota Mining and Manufacturing Company until 2002, is an American multinational conglomerate corporation with a worldwide presence. It produces over 75,000 products, including: adhesives, abrasives, laminates,...

M3 Half-track, an armored military vehicle

M3 Grant, a medium tank that was a variant of the M3 Lee

M3 Lee, an American medium tank

Short for Metroid 3

M3 motorway, a motorway in England

Modula-3 (M3), a programming language

M3 20mm cannon, a United States development of the Hispano-Suiza HS.404

M3 Grease Gun, an American sub-machine-gun

M3, a BBC peak programme meter standard used for measuring the volume of audio broadcasts

M3 howitzer, an American light artillery piece.

M3, a code name for a United States military mission at Roosevelt Roads Naval Station in Puerto Rico

M3 adapter, a Game Boy Advance movie player

M3 (railcar), a railcar used by the Long Island Rail Road and Metro-North Railroad, United States

Cubic metre (m³), a measure of volume

M3 Scout Car, an American armored vehicle.

M3 motorway (Northern Ireland), an urban motorway in Belfast, Northern Ireland

Major third (M3), a type of musical interval

Benelli M3 Super 90, an Italian semi-automatic shotgun

M-3 (Michigan highway), a state highway in the Detroit metropolitan area

Minor third (m3), a type of musical interval

M3 motorway (Pakistan)

ABSA - Aerolinhas Brasileiras (IATA airline designator: M3), a cargo airline based in São Paulo, Brazil

M3 (album), an album by the heavy metal band Mushroomhead

Short for Man, Moment, Machine, or the "M3 factor" which means "Man, Moment, Machine."

M3 Records, a record label

Messier 3 (M3), a globular cluster in the constellation Canes Venatici

M3 (rock band), an American rock band

Russian route M3, another name for the Ukraine Highway in Russia

M3 Line, part of the Bucharest Metro, Romania

M3 motorway (Hungary), a motorway in Hungary

M3 freeway in Victoria, Australia, currently under construction and more widely known as Eastlink and which when finished, will be linked with the Eastern Freeway

M3 (Cape Town) an expressway in Cape Town, South Africa

M3 (economics), a measure of the money supply