Patent ID: 11891189
Assignee: THE BOEING COMPANY
Field: Mechanical elements (Mechanical engineering)
Classification: CPC B  F | IPC B  F

Claim 15:
16. The aircraft as set forth in claim 15 wherein:
the insert includes an outer surface;
the cap is formed of a nonconductive material that is permanently attached to the outer surface of the insert to form the cover unit;
the cap includes an end face that abuts the first side of the structure;
the insert includes a first threaded portion that faces into the first aperture and a second threaded portion that faces into the second aperture;
the first threaded portion presents threads in a first direction;
the second threaded portion presents threads in a second direction;
the first direction and the second direction are different from each other;
the outer edge of the washer and the second threaded portion of the insert are threaded together; and
the end portion of the fastener and the first threaded portion of the insert are threaded together without accessing the outer surface of the insert and without causing the cover unit to unthread from the washer.