Class 5
- A5-class customs vessels
- BR Standard Class 5
- BR Standard Class 5 73096
- BR Standard Class 5 73156
- Baltimore and Ohio Railroad EL-5 class
- Chicago, Burlington and Quincy O-5 class
- Class 05 (disambiguation)
- Class 5 telephone switch
- Class V (disambiguation)
- Classes of supply
- G-5-class motor torpedo boat
- GCR Class 5
- GCR Class 5A
- Indian locomotive class WAG-5
- Indian locomotive class WAP-5
- Indian locomotive class WDG-5
- JKOY Class Sm5
- KUR EC5 class
- LMS Stanier Class 5 4-6-0
- LMS Stanier Class 5 4-6-0 4932
- LMS Stanier Mogul
- LNER Class K5
- NSB Di 5
- NSB El 5
- New Haven class I-5
- Pennsylvania Railroad class A5s
- Pennsylvania Railroad class G5
- Pennsylvania Railroad class K5
- Pennsylvania Railroad class L5
- Pennsylvania Railroad class P5
- S5-class submarine
- SCORE Class 5
- Sa'ar 5-class corvette
- Southern Pacific class AC-5
- Southern Pacific class GS-5
- TS Class 5
- Truck classification
- Type 5 (disambiguation)
- U-5-class submarine (Austria-Hungary)
- Yosemite Decimal System