PT4 or variant may refer to:
- New Horizons PT4, aka 2014 MT69, a celestial object.
- PT-4, a pre-World War II US Navy PT-boat.
- Prison Tycoon 4: Supermax (2008 videogame)
- PT4, a paratriathlon classification.
This disambiguation page lists articles associated with the same title formed as a letter–number combination.
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