Fixture

A fixture for positioning and fixing an object to be fixed to a fixing object including a column body having a screw shape, the object to be fixed having a plate shape extending along a plane crossing an axis line of the column body, in a positional relationship where an axis line of a through hole penetrating the object to be fixed in front-back directions of the object to be fixed extends along the axis line of the column body, the fixture comprising:

• a coupling portion formed with a thread for coupling fittable to the column body on one surface side of the object to be fixed in the front-back directions;
• an extending portion that extends from the coupling portion in a length reachable to an other surface side of the object to be fixed in the front-back directions through the through hole and that includes a male thread for coupling formed along an outer peripheral surface of a region of the extending portion reachable to the other surface side;
• and
• a flange portion that is a member extending from the coupling portion to be larger in diameter than the through hole and that is formed with a contacting surface directly or indirectly contactable with the one surface side of the object to be fixed in the front-back directions in a situation where the coupling portion is fitted to the column body,
• wherein the thread of the coupling portion and the male thread of the extending portion are formed to have a same thread pitch as that of the column body.