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