M47

M47 or M-47 may refer to:


 * M47 bomb, an American chemical/incendiary weapon
 * 47th known Mersenne prime
 * M47 Dragon, an American anti-tank missile system
 * M-47 (Michigan highway), a state highway in Michigan
 * M47 (Cape Town), a Metropolitan Route in Cape Town, South Africa
 * M47 (Johannesburg), a Metropolitan Route in Johannesburg, South Africa
 * M47 Patton, an American main battle tank
 * BMW M47, diesel engine (1998–2007)
 * Messier 47, an open star cluster in the constellation Puppis
 * Madsen M47, a Danish rifle