| 摘要 |
A screw (60) is described, having a shaft (32) and a head (66) for fasten ing a component onto a substructure by means of tightly pressing a conical s ealing disk (50) onto the component. The screw head (66) is configured at th e bottom (64) thereof around the shaft (32) as a cone that is tapered in the direction of the top (68) of the screw head (66). The cone angle of the con ical sealing disk (50) measured against a perpendicular line to the disk axi s is equal to, or larger than the cone angle (alpha) of the screw head (66) measured against a perpendicular line to the screw axis. When the screw (60) is tightened, the conical bottom (64) of the screw head (66) and the conica l top (58) of the sealing disk (50) are in mutual surface contact with each other. This maintains a sealing connection. By means of the conical configur ation of the bottom (64) of the screw head (66) the so-called ~cupping~ of t he sealing disk (50) is prevented when the screw (60) is tightened.
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