R51 may refer to:
- R51 (South Africa), a road
- HMS Chevron (R51), a destroyer of the Royal Navy
- HMS Perseus (R51), an aircraft carrier of the Royal Navy
- Nissan Pathfinder (R51), a sport utility vehicle
- R51: Toxic to aquatic organisms, a risk phrase
- Remington R51, a semi-automatic pistol
This disambiguation page lists articles associated with the same title formed as a letter–number combination.
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If an internal link led you here, you may wish to change the link to point directly to the intended article.