M45
M45 , M 45 , M / 45 or M-45 is the name or abbreviation for:
- Messier 45 , the star cluster Pleiades (seven stars)
- M 45 (MSBS) , French submarine-based nuclear ICBM
- Carl Gustaf M / 45 , Swedish submachine gun
- M45 Quadmount , American quadruple anti-aircraft machine gun
- M45 motorway , British motorway
- M-45 (Michigan) , road in the US state of Michigan
- M45 , a steel helmet that was developed by the German Reich from 1942
