6M or 6-M can refer to:
6m, or 6 metres 6-meter band NJ 6M, now New Jersey Route 159 Elliott 6m, an Olympic-class keelboat 6 Metre, a class of racing yachts Period-after-opening symbol Lim-6M, a model of PZL-Mielec Lim-6 PMD-6M, a model of PMD series mines VF-6M, see VMFA-232 VB-6M, see VMF-132 6M-GE, a model of Toyota M engine Yorkfield 6M, a model of Yorkfield Welch OW-6M, see Welch OW-5M MH-6M, model of MD Helicopters MH-6 Little Bird H-6M, a model of Xian H-6 E-6M series, see Luna 13 6M, the production code for the 1984 Doctor Who serial The Awakening
See also M6 (disambiguation)