6M

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