6U
6U or 6-U may refer to:
Aviation
- Air Ukraine (IATA code:
6U) - PW-6U, a model of Politechnika Warszawska PW-6 glider
- HY-6U, a model of Xian H-6 jet bomber
Other technologies
- 6U, a rack unit configuration of 10½-inch depth
- RG-6/U coaxial electrical cable
- 6U, a model of Zenit Soviet spy satellite