PT5 or variants may refer to: Pratt & Whitney PT5 a turboprop engine variant of the J57 turbojet engine, given the military designation T57 Consolidated XPT-5, an experimental variant of the PT-3 training airplane PT-5, a pre-World War II US Navy PT-boat. PT5, a Para triathlon classification Prison Tycoon: Alcatraz (2010 videogame), 5th game in the Prison Tycoon series 2024 PT5, a near-Earth object