J40
# J40

J40 may refer to:

* County Route J40 (California)
* Elongated pentagonal orthocupolarotunda, a Johnson solid $(J_{40})$
* HMS Fermoy (J40), a Hunt-class minesweeper of the Royal Navy
* Toyota Land Cruiser (J40), a Japanese off-road vehicle
* Westinghouse J40, an American turbojet engine
