An aircraft structure, for example a wing (20), includes a structural skeleton having structural elements (for example, spars (60) and ribs (70)) enclosed within a skin (200). A fastener (110a,b) is fastened to the skeleton and wholly within the skin (200). The fastener (110a,b) fastens to the structure (20) a bracket (120) for carrying stores (80). The fastener (110a,b) includes a body (300) defining an internal bore (230). The body (300) includes an internal threaded region (330), within the internal bore (230), for fastening the bracket (120) to the aircraft structure (20).