| 摘要 |
A fastening device is adapted for securing a wheel rim to a vehicle axle and is adapted to be driven rotatably by a driving tool. The fastening device includes a fastening member and a protection cap. The fastening member has a tool-engaging head portion and a first positioning portion. The protection cap has a cover portion and a sleeve portion that cooperates with the cover portion to cover the tool-engaging head portion and that is formed with a second positioning portion engaging removably the first positioning portion. When the protection cap is removed from the fastening member, the tool-engaging head portion of the fastening member is engageable with the driving tool.
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