0T

0T (zero T) or 0-T may refer to:

• 0t, or Zero temperature, alternate term for absolute zero
• One of several Whyte notations for steam locomotive classifications
  • 0-4-0T, variant of 0-4-0
  • 0-6-0T, variant of 0-6-0
    • Bristol and Exeter Railway 0-6-0T locomotives
    • List of preserved Hunslet Austerity 0-6-0ST locomotives
    • LMS Fowler Class 3F
    • GWR Sir Watkin Class
  • 0-10-0T, variant of 0-10-0
  • 2-4-0T, variant of 2-4-0
    • South Devon Railway 2-4-0 locomotives
    • Highland Railway O Class
  • 2-6-0T, variant of 2-6-0
  • 2-8-0T, variant of 2-8-0
  • 4-4-0T, variant of 4-4-0
    • Bristol and Exeter Railway 4-4-0T locomotives
  • 4-8-0T, variant of 4-8-0
    • South African Class 13 4-8-0T+T