Nord 2.121 to 2.180 were a class of 60 four-cylinder 4-4-0 compound steam locomotives of the Chemins de fer du Nord; they were used as express passenger train locomotives.

At the creation of the SNCF in 1938, the surviving locomotives were renumbered 2-220.A.1 to 2-220.A.4 Two prototypes were designed by Alfred de Glehn, of SACM and Gaston du Bousquet of the Nord as an improvement from the No.

One of them initially lacked a coupling rod, making it a 4-2-2-0, but wheelslip issues quickly ended the experiment.

[1] In 1903, locomotives 2.121 to 2.123 and 2.126 were sold to the Compagnie du Nord - Belge who renumbered them 307 to 310.

[2] SACM delivered two prototypes from their Belfort factory in 1891, and later delivered all the production locomotives: