flange capscrew 凸缘内六角螺钉

button-head capscrew 圆头螺钉

housing cover capscrew 壳体外罩内六角螺钉

button-head e capscrew 圆头螺钉

capscrew hole 帽形螺钉孔

capscrew bolt 有头螺栓

capscrew w bolt 有头螺栓

gear box capscrew 变速器有头螺钉

gear case capscrew 变速器有头螺钉