CPV code 35422000 designates Electronic and electrical spare parts for military vehicles in the Common Procurement Vocabulary (CPV 2008), the EU classification used to describe the subject of public contracts.
35422000 is a leaf code — the most specific level of its branch — so it can be used directly as the main CPV code of a contract notice. If it does not quite fit, check the neighbouring codes under 35420000 (Parts of military vehicles).