The South African Railways Class NG G12 2-6-2+2-6-2 of 1927 was an articulated narrow-gauge steam locomotive.

In 1927, the South African Railways (SAR) placed two Class NG G12 Garratt articulated 2-6-2+2-6-2 steam locomotives in service.

Collins, Chief Mechanical Engineer of the South African Railways (SAR), decided to acquire a smaller Garratt type for two new light-rail narrow-gauge branch lines which were completed in 1926.

In 1927, an orders was placed with Beyer, Peacock & Company for the design and construction of two lightweight narrow-gauge 2-6-2+2-6-2 Garratt locomotives.

Both remained there until 1949, when the Kakamas line was also widened to Cape gauge and they were returned to South West Africa for a brief period.