Fixing object, fixation item, fixing method, and assessment method

摘要

To improve the visual probability of the quality of a fixed state of a fixing object fixed to a fixation item, the fixing object includes the supporting part having a hole and a groove formed in proximity to the hole. The groove is provided with a one-way open part, opened in a surface of the supporting part in which one exit of the hole is located and not opened in a surface of the supporting part in which the other exit of the hole is located, and the distance from the center of gravity of the hole to the portion of the groove that is farthest from the center of gravity of the hole is greater than the distance from the center of gravity to a side-surface portion in the hole that is closest to the groove without touching the groove.