HEXAGONALSOCKET HEAD CAP SCREW HAVING CIRCULAR SIDE OF HEXAGONAL SIDE AND PROVIDING CONSTANT INTERVAL AT EACH VERTEX BETWEEN SIDES 六角穴の六角形の各辺を弧形とし、その辺と辺と の各頂点部分に一定の間隔をつけた穴付きボルト - 特許庁
A male screw part 27 of a hexagonalsocket head cap screw 26 is screwed into a female screw hole 25 formed on the protrusion 23. その突起(23)に形成したメネジ孔(25)に、六角穴付きボルト(26)のオネジ部(27)を螺合させる。 - 特許庁