| 摘要 |
The invention relates to an attachment fastener that comprises a body (1) extending in an axial direction, with a head (2), a leg (3) and a skirt-shaped flexible collar (4) provided between the head (2) and the leg (3), and annular sealing washer (5) for sealing the length of a peripheral edge (42) of the collar (4), said sealing washer (5) having a lower surface (57) directed towards the opposite side of the collar (4) having at least one annular bead defining a first sealing line on the lower surface (57) of the washer (5). The sealing washer (5) is adapted to be removably attached onto said peripheral edge (32) of the collar (4), and comprises an upper surface opposite the lower surface (57), which defines an annular shoulder protruding on the side of the collar (4) and on which bears said peripheral edge (42) of the collar (4), said annular shoulder defining another sealing line on the upper surface of the washer (5). |
