Summary The UK is the primary Level 1 partner for the F-35 program, with British components in many parts of the jet. European countries like Netherlands and Italy also contribute to F-35 manufacturing, along with Japan. F-35 jets have components from around the world, including Canadian inserts, Australian tail sections, and Turkish parts (replaced).

The F-35 Joint Strike Fighter is an American fighter jet , but being an American fighter jet doesn't mean it is fully American. Take a closer peak at the F-35, and one can find the fingerprints of many US allies in it. For example, the British supply many components (especially for the F-35B variant).

Even Turkey supplied components for the jet before the US kicked Turkey out of the program. Not all jets are assembled in the US; Japan is assembling their F-35As in Japan , while many Europeans assemble theirs in Europe with final check out in Italy . United Kingdom: The F-35's sole Level 1 partner Great Britain is the F-35's only Level 1 partner.

British industry significantly contributes to the production of every F-35 fighter jet. While Lockheed Martin is the prime contractor for the F-35, BAE is a significant subcontractor. BAE states it holds a 13-15% workshare of each aircraft (excluding propulsion).

Examples of British F-35 parts: Contractor: LiftSystem (only F-35B): Rolls-Royce Software code: BAE Ejection seat: Martin Baker Rear fuselage (all F-35s): BAE BAE contributes with software code, including for cockpit display, fu.