| 摘要 |
A multi-part fastener assembly for attaching a first apertured member such as a valve cover to a second member such as a cylinder head, comprising an elongated threaded fastener, a tubular sleeve encircling the threaded fastener, and a rubber grommet encircling the sleeve. The grommet's outer surface is cylindrical for facilitating its insertion through the valve cover's aperture. However, a bead formation created on the grommet's inner surface is engaged upon insertion of the sleeve member through the grommet to cause the lower edge portion of the grommet to be biased radially outward in a manner which secures the sleeve and grommet in the aperture. In addition, the sleeve's upper end portion has a surface extending obliquely to the axis of the sleeve so that when pressed against the grommet by tightening of the fastener the rubber grommet material is distorted outwardly. Further tightening of the fastener seats the lower end of the sleeve member against the associated cylinder head to limit the stress imposed upon the rubber grommet by the sleeve.
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