6F or 6-F can refer to:
Six Flags amusement parks Ford 6F transmission; see GM-Ford 6-speed automatic transmission A-6F, a model of Grumman A-6 Intruder Grumman F6F Hellcat Sucrose 6F-alpha-galactosyltransferase Cunningham-Hall Model PT-6F, a model of Cunningham-Hall PT-6 ER-6f, an alternate name for the Kawasaki Ninja 650R 6F, the production code for the 1983 Doctor Who serial Mawdryn Undead Primera Air Nordic, a Latvian airline (IATA code 6F, 2014-2018)
See also F6 (disambiguation)