The South African Railways Class NG8 4-6-0 of 1904 was a narrow-gauge steam locomotive from the pre-Union era in the Cape of Good Hope.

In 1904, the Cape Government Railways placed six Type B 4-6-0 steam locomotives in service on the Avontuur 2 feet (610 millimetres) narrow-gauge line in the Langkloof.

[1] The Cape Government Railways (CGR) ordered six narrow-gauge locomotives with a 4-6-0 wheel arrangement and eight-wheeled bogie tenders from W. G. Bagnall in 1903.

The order initially specified the same 2-6-0 wheel arrangement, but experience with the three Hopefield locomotives led to the decision to alter the design specifications to 4-6-0.

6, but this is possibly incorrect, since numbers 1 to 4 had, at the time, already been allocated to the CGR's Baldwin 2-6-0 locomotives of 1902, which worked on the Hopefield line.

[1] In 1915, shortly after the outbreak of the First World War, the German South West Africa colony was occupied by the Union Defence Forces.

NG27 was sold to the Eastern Province Cement Company and employed to haul limestone on its industrial line from New Brighton in Port Elizabeth, which linked up with the Avontuur branch at Chelsea Junction.