Commonwealth Railways NM class

Commonwealth Railways NM class
Preserved NM34 at the National Railway Museum in October 2010
Type and origin Power type Steam Builder Thompson & Co, Castlemaine Build date 1925-1927 Total produced 22
Specifications Configuration: ​  • Whyte 4-8-0 Gauge 1,067 mm (3 ft 6 in) Fuel type Coal Firebox: ​  • Grate area 18.5 sq ft (1.72 m2) Boiler pressure 160 psi (11 bar; 1,100 kPa) Cylinder size 17 in × 22 in (432 mm × 559 mm)
Performance figures Tractive effort 18,085 lbf (80.45 kN)
Career Operators Commonwealth Railways Numbers NM15-NM28 NM31-NM38 First run June 1925 Preserved NM25, NM34 Current owner National Railway Museum Pichi Richi Railway Disposition 2 preserved, 20 scrapped

The Commonwealth Railways NM class locomotive was a class of 4-8-0 locomotives of the Commonwealth Railways, Australia. The class operated on 1,067 mm (3 ft 6 in) narrow gauge lines in South Australia and the Northern Territory.