6T or 6-T may references to:

6T, IATA code for Air Mandalay 6T Thunderbird; see Triumph Thunderbird 6T SRAM (for 6 transistors); see 1T-SRAM RDS-6t Truba warhead; see Joe 4 Ye-6T, one of the 1958 Mikoyan-Gurevich MiG-21 variants 2-8-6T locomotive; see 2-8-6 PRC-6T walkie-talkie; see AN/PRC-6 6T, the production code for the 1985 Doctor Who serial Attack of the Cybermen OnePlus 6T, an Android-based smartphone manufactured by OnePlus

See also T6 (disambiguation)