| 摘要 |
The present invention relates to a tab effective length measuring device. A male screw part screwed to a screw groove is coupled to one side of a gauge body where a display part and a measurement unit are installed through a main shaft. A sliding plate moved along the main shaft by a distance where the male screw part is screwed to the screw groove is coupled to the main shaft. A measurement bar connected to the measurement unit is coupled to one surface of the sliding plate. Therefore, the present invention accurately measures the depth of the screw groove through a work by allowing the display part formed in the gauge body to display the depth of the screw groove while the male screw is screwed to the screw groove. |
