| NZR D class | 
|---|
 | 
 | 
| Specifications | 
|---|
 Configuration:
  |  | 
|---|
 |  • Whyte | 2-4-0T | 
|---|
 |  • UIC | 1B nt | 
|---|
 | Gauge | 3 ft 6 in (1,067 mm) | 
|---|
 | Driver dia. | 36 in (914 mm) | 
|---|
 | Length | 21 ft 6 in (6.55 m) | 
|---|
 | Adhesive weight | 11 long tons 10 cwt (25,800 lb or 11.7 t) | 
|---|
 | Loco weight | 14 long tons 14 cwt (32,900 lb or 14.9 t) | 
|---|
 | Fuel type | Coal | 
|---|
 | Fuel capacity | 0 long tons 11 cwt (1,200 lb or 0.6 t) | 
|---|
 | Water cap. | 300 imp gal (1,400 L; 360 US gal) | 
|---|
 | Firebox: |  | 
|---|
 |  • Grate area | 7.3 sq ft (0.68 m2) | 
|---|
 | Boiler pressure | 130 psi (0.90 MPa) | 
|---|
 | Heating surface | 392 sq ft (36.4 m2) | 
|---|
 | Cylinders | Two, outside | 
|---|
 | Cylinder size | 9.5 in × 18 in (241 mm × 457 mm) | 
|---|
 
  | 
 | 
| Career | 
|---|
 | Operators | Public Works Department New Zealand Railways Department | 
|---|
 | Number in class | 35 | 
|---|
 | Numbers | 6, 16, 18, 46-51, 108-9, 130-1, 137-145, 149, 169-171, 195-98, 221-2, 240, 315, 578 | 
|---|
 | First run | May 1874 | 
|---|
 | Last run | March 1927 | 
|---|
 | Disposition | Seven preserved, one converted into diesel-mechanical, remainder scrapped | 
|---|
 
  | 
NZR D class steam tank locomotives operated on New Zealand's national railway network.  The first entered service in 1874 all had been withdrawn by the end of 1927, which allowed the D classification to be used again in 1929.