Class 7
- BR Standard Class 7
- BR Standard Class 7 70000 Britannia
- BR Standard Class 7 70048 The Territorial Army 1908–1958
- Baltimore and Ohio P-7
- British Rail Class 07
- GWR 7 (Armstrong) Class
- GWR 7 Class
- HAZMAT Class 7 Radioactive substances
- Ha-7-class submarine
- I-7-class submarine
- Indian locomotive class WAG-7
- Indian locomotive class WAP-7
- Indian locomotive class WDM-7
- LMS Class 7F 0-8-0
- LSWR M7 class
- LSWR T7 class
- MGWR Class 7
- Milwaukee Road class F7
- NSB Di 7
- NSB El 7
- Southern Pacific class AC-7
- Surface of class VII
- TS Class 7
- Truck classification
- U-7 class submarine (Austria-Hungary)
- VR Class Dm7
- W-7-class minesweeper