To provide an earth bracket of construction machinery, which can restrain a female screw portion from being deformed by welding heat, which can prevent damage to a working tool even when needing retapping working, and which can reduce costs. 雌ねじ部の溶接熱による変形を抑制できるとともに、再タッピング加工が必要になった場合でも加工具の損傷を防止でき、しかもコストダウンを可能とする。 - 特許庁