Abstract: The concave part includes an open end portion having an inner diameter greater than an outer diameter of a tip end portion of a ball stud, a fitting portion which is connected to the open end portion and has an inlet smaller than the outer diameter of the tip end portion and in which the tip end portion is housed, and a plurality of slits which are formed in a fitting direction of the ball stud from the open end portion and arranged at a predetermined interval along the circumference of the concave part. The pull-out prevention part includes a plurality of first ribs located on extensions of the respective slits.

Abstract: The concave part includes an open end portion having an inner diameter greater than an outer diameter of a tip end portion of a ball stud, a fitting portion which is connected to the open end portion and has an inlet smaller than the outer diameter of the tip end portion and in which the tip end portion is housed, and a plurality of slits which are formed in a fitting direction of the ball stud from the open end portion and arranged at a predetermined interval along the circumference of the concave part. The pull-out prevention part includes a plurality of first ribs located on extensions of the respective slits.

Abstract: A cover unit includes a first divisional cover, and a second divisional cover. The first divisional cover and second divisional cover include a first locking portion and second locking portion, respectively. The first locking portion and second locking portion are made of an elastomer. The first locking portion and second locking portion lock to one another to couple the first divisional cover to the second divisional cover, or vice versa. The first locking portion includes a prong-shaped main tab. The second locking portion includes a main bore into which the main tab is insertable. The main tab includes a main claw disposed on the leading-end side, and locked to the main bore to inhibit the main tab from coming off from the main bore.

Abstract: A cover unit includes a first divisional cover, and a second divisional cover. The first divisional cover and second divisional cover include a first locking portion and second locking portion, respectively. The first locking portion and second locking portion are made of an elastomer. The first locking portion and second locking portion lock to one another to couple the first divisional cover to the second divisional cover, or vice versa. The first locking portion includes a prong-shaped main tab. The second locking portion includes a main bore into which the main tab is insertable. The main tab includes a main claw disposed on the leading-end side, and locked to the main bore to inhibit the main tab from coming off from the main bore.