The Nasu is a tracked articulated, all-terrain transport vehicle developed by Sisu Auto for the Finnish Army. It consists of two units, with all four tracks powered. It can carry up to 17 people, although the trailer unit can be adapted for different applications. There are two main versions, the NA-140 BT and the NA-110.

Sisu Auto is a truck manufacturer based in Raseborg, Finland. Its name comes from the Finnish word sisu meaning guts, grit and determination.