P51

P51 or P-51 may refer to :

• North American P-51 Mustang, a World War II American fighter aircraft
• BenQ-Siemens P51, a PDA phone
• HMS Unseen (P51), a 1942 British Royal Navy U-class submarine
• LÉ Róisín (P51), a 1999 ship of her class of offshore patrol vessel in the Irish Naval Service
• P-51 can opener, a can opener issued by the United States Armed Forces
• Parker 51, a fountain pen made by the Parker Pen Company