| 摘要 |
For assembling at least two parts of an object with one another, a bolt having a thread is introduced into the parts, a washer is placed on a free end of the bolt, a nut is threadingly connected to the free end of the bolt so as to abut against the washer, a power tool is placed so as to turn the nut by a rotatable element of the power tool connected to the nut to tighten or loosen the bolt and to apply a non-rotatable element of the power tool to the washer to absorb reaction force and the body of the washer is provided with a breaking point such that when the nut is turned and turns the bolt, the washer stops the bolt from turning and thereby the nut creates a pull on the bolt which elongates the bolt in an axial direction and applies to the body of the washer an axial force which breaks a portion of the body of the washer and allows a portion of the body of the washer to be pulled axially when the bolt elongates.
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