The invention relates to a hook latch (73) configured so as to lock and unlock a mobile structure on a fixed structure of a vehicle, said latch having an adapter (69) fitted with a hook (73) capable of fastening a keeper, a handle comprising a trigger, on the handle, a second pivot connection axis, on the trigger, at least one hook capable of fastening at least one protrusion (125) of a bracket (121) connected to the adapter, a third pivot connection axis, around which the handle and the adapter are guided in rotation in relation to each other, and characterised in that it comprises an adjustment device for adjusting the flushness of the upper surface of the handle in relation to the aerodynamic surface, said device comprising the bracket (121), a screw (129) capable of being screwed and unscrewed within a first tapped recess of the adapter.