LIGHTNING PROTECTION FASTENER AND CAP FOR LIGHTNING PROTECTION FASTENER

摘要

To provide a lightning protection fastener or the like, that can reliably seal an arc between the cap and a member such as a wing panel. An end part 30A of a cap 30 on an opening side, the end part 30 A facing a member 22 (or member 21), includes a plane 30d orthogonal to an axis line of the cap 30A and a tapered face 30c formed on an outer circumferential side of the plane 30d. A sealant 34 that spills out of the cap 30A upon mounting the cap 30A is present between the tapered face 30c and a surface 22f of the member 22 (sealant 34S).

主权项

1. A lightning protection fastener comprising:
a fastener member having a shaft that penetrates a first member and a second member so as to fasten the second member to the first member that constitutes an airframe of an aircraft, the shaft protruding toward at least one of the sides of the first member and the second member; a cap, made of an insulating material, that is attached so as to cover the shaft of the fastener member that protrudes toward at least one of the sides of the first member and the second member; and a sealant, made of an insulating material, that is filled into the cap to seal a space between the cap and the fastener member, wherein the cap has an opening that accommodate the shaft of the fastener member, an end part of the cap on the opening side, the end part facing the first member or the second member, comprises a plane orthogonal to an axis line of the cap and a tapered face formed on an outer circumferential side of the plane; and wherein the sealant is filled between the tapered face and a surface of the first member, or between the tapered face and a surface of the second member.