When you install teak wood flooring, you will use either nails or staples for the job. While you could potentially use both, it may be to your advantage to use staples. Each staple will go into the wood flooring in 2 different spots, which means that it will grab more of the wood.
Some people do not like to use staples with the harder hardwoods because they bend more easily than nails. However, teak is considered to be a softer wood on the Janka scale, with a score of 1155—softer than oak.