D locomotives

class of East German 0-8-0dh locomotives

class of 56 Swedish diesel-hydraulic locomotives

class of 25 Swedish narrow-gauge 1'C1'dh locomotives

Under the Whyte notation for the classification of steam locomotives, ' represents the wheel arrangement of no leading wheels, eight powered and coupled driving wheels on four axles and no trailing wheels. Locomotives of this type are also referred to as eight coupled'.

class of 15 German 0-8-0dh locomotives