M18

M18 or M-18 may refer to:

Aircraft

 * Messerschmitt M 18, an early German airliner
 * Miles M.18, a Miles aircraft
 * Mooney M-18 Mite, a low-wing monoplane
 * PZL-Mielec M-18 Dromader, an agricultural and aerial-firefighting aircraft

Firearms and military equipment

 * M18 Claymore mine, an American anti-personnel landmine
 * M18 Hellcat, an American tank destroyer used in World War II
 * M18 smoke grenade, a colored smoke grenade
 * M18 recoilless rifle, a late-World War II recoilless rifle
 * SIG Sauer M18 pistol, a compact, carry sized SIG Sauer P320 used by the United States armed forces

Roads and highways

 * M18 motorway (Great Britain)
 * M18 motorway (Ireland)
 * M-18 (Michigan highway)
 * M18 (East London), a Metropolitan Route in East London, South Africa
 * M18 (Cape Town), a Metropolitan Route in Cape Town, South Africa
 * M18 (Johannesburg), a Metropolitan Route in Johannesburg, South Africa
 * M18 (Pretoria), a Metropolitan Route in Pretoria, South Africa
 * M18 (Port Elizabeth), a Metropolitan Route in Port Elizabeth, South Africa
 * List of M18 roads

Other uses

 * M18, a metric screw thread
 * Messier 18, an open star cluster in the constellation Sagittarius
 * M18 or M-18, Mara 18, Central American street gang
 * Hope Municipal Airport, Arkansas, United States (FAA location identifier: M18)
 * A line of 18-volt power tools manufactured by Milwaukee Electric Tool Corporation
 * M18, a student club at the Bauhaus University, Weimar, Germany
 * M18, a media content rating issued by the Infocomm Media Development Authority of Singapore