R42
# R42

R42 or R-42 may refer to:

## Roads

* R42 (Belgium)
* R42 (South Africa)

## Other uses

* R42 (New York City Subway car)
* HMS Undine (R42), a destroyer of the Royal Navy
* Junkers R 42, a transport aircraft
* R42: May cause sensitisation by inhalation, a risk phrase
* Sidolówka, a Polish hand grenade
* Spectre R42, a British sports car
