| 摘要 |
A variable-length distancing unit has a tubular male component with external threads in mesh with the internal threads of a sleeve-like female component. Each component has a head which can be engaged by the working end of a wrench or another torque transmitting tool to rotate the male component relative to the female component and/or vice versa in order to select the axial length of the distancing unit. A locknut and/or a radially extending plastic screw is used to fix the two components in selected axial positions relative to each other. An axial passage of the male component can receive the shank of a bolt or screw. The head of the male component is similar to or identical with the head of the female component and/or with the locknut. This ensures that one and the same tool can be used to turn any one of these parts relative to the adjacent part or parts. The distancing unit can be used to select and maintain the distance between two or more parts and/or to change the inclination of a first part relative to one or more second parts.
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