Grommet

摘要

A grommet has a plurality of inner projecting strip portions and a plurality of outer projecting strip portions on inner and outer peripheral surfaces of the tapered portion, respectively. The plurality of inner and outer projecting strip portions respectively extend in an axial direction of the tapered portion and are spaced from each other in a circumferential direction. The outer projecting strip portions are located opposing to the inner projecting strip portions. A projection amount of the outer projecting strip portions is changed at a contact point. At the contact point, when the grommet is inserted into a through hole, the grommet first contacts an inner peripheral surface of the through hole. The projection amount between the contact point and a large diameter side end of the projecting strip portions is smaller than a second projection amount between the contact point and a small diameter side end.