| 摘要 |
PROBLEM TO BE SOLVED: To reduce insertion force of a grommet which is inserted into a through hole of the car body panel. SOLUTION: A plurality of protrusions are provided which are axially extended at intervals in the peripheral direction along the outer peripheral surface of an expanded diameter cylinder part. Grooves are provided in recesses between the protrusions. The projecting quantity of the protrusion is changed at the position which acts as a contacting point with the inner surface of the through hole, wherein the projecting quantity from the contacting to the tip of a sloped wall is set small. |
