The USRA Heavy Mikado was a USRA standard class of steam locomotive designed under the control of the United States Railroad Administration (USRA), the nationalized railroad system in the United States during World War I.
The term Four-coupled is often used for 0-4-0 locomotives. Four-wheeled is also sometimes used,
but this term can also encompass other wheel arrangements, for example Stephenson's Rocket which
was an 0-2-2 four-wheeled locomotive