There were a total of twenty-five vans in class F and all but the last group of six were rebuilds. This class consisted of four distinct groups of vehicles.

The first group consisted of twelve vehicles on the N.Z.R type 15'-0" composite underframe. The first batch (2018-2023) was converted in 1896 from H class lowside wagons whilst the second batch were converted in 1898 from G class wagons 3893-3898. In 1901 F3983/4/6-8 were designated as being for Express train use only. From 1909 they were either converted to or replaced by FA class vans as follows:

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The second group consisted of only two vehicles (F4555 & 4556) converted from AI class composite carriages 21 and 23. F4555 and 4556 were 16'-0" long over headstocks and slightly higher than the first and third groups of F class wagons (but were otherwise visually similar). They were replaced by FA class wagons in 1909 and 1934 respectively.

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The third group consisted of five vehicles on the 14'-0" GSR type underframe. Of these, F4276 is believed to have been converted from a G.S.R. G type wagon whilst 4317, 4318, 4328 and 4339 are believed to be conversions of G.S.R. H type wagons. It is difficult to know whether 4317 was rebuilt or not when it was reclassified to FA. I suspect that it was not altered. Disposal of these wagons was as follows:

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