CAP, FASTENED STRUCTURE USING SAME, AND AIRCRAFT HAVING SAID FASTENED STRUCTURE

摘要

Provided are a cap which prevents situations where sparks are generated internally even if lightning current flows through a fastener, thereby improving safety; a fastened structure using this cap; and an aircraft having this fastened structure. The cap (27) is installed in such a way as to cover the portion of a fastener (15) that protrudes out of a stringer (11), said fastener (15) connecting the upper skin (3) of the aircraft to the stringer (11), said stringer (11) located on the inner side of the upper skin (3). The outside surface (33) of the cap (27) in contact with a space inside the upper skin (3) is formed by a curved surface, and is made of an electrically conductive material.