1M or 1-M may refer to:
1m or 1 metre 1M as one million Dinas Rekani Astra 1M satellite Mars 1M spacecraft Northrop N-1M, an American experimental aircraft Globus-1M No.12L, a Russian military communications satellite UH-1M, model of Bell UH-1 Iroquois TAC-1M, variant of the semi-automatic carbine Demro TAC-1 SPP-1M, a variant of the SPP-1 underwater pistol PDM-1M mine, a variant of the PDM series of amphibious mines VO-1M, an early designation of the Marine Attack Squadron VMA-231 YaK-1M, a variant of the Yakovlev Yak-1 SSH 1M (WA), an early name of Washington State Route 121 BWP-1M, a BMP-1 variant BMW 1M, a BMW 1 Series M Coupe
Other uses
2021 Salvadoran political crisis, commonly referred to as 1M (1 May)
See also M1 (disambiguation) LM (disambiguation) IM (disambiguation)