5M

5M or 5-M may refer to:


 * 5M model, a troubleshooting and risk-management model used for aviation safety
 * Sibaviatrans (IATA code), a former airline
 * 5M, a Toyota M engine
 * 5M, a model of HP LaserJet 5
 * Shada (Doctor Who) (production code: 5M), an unfinished Doctor Who serial