The General Electric J73 is a type of jet engine.
J73 may also refer to:
HMS Niger (J73), A British minesweeper Johnson solid J73, a geometric shape JOVIAL J73, a computer programming language LNER Class J73, a class of British steam locomotives TransMilenio J73, a Colombian bus rapid transit route
See also
Chengdu J-7 III "Fishcan", Chinese jet fighter plane series variant of the MiG-21
73 (disambiguation) J (disambiguation)