Aerospace series - Nuts, hexagon, slotted/castellated, reduced height, normal across flats, in heat resisting steel, silver plated - Classification: 900 MPa (at ambient temperature)/650 °C; German version EN 2809:2001
航空航天系列.镀银耐热钢制标准对边减高开槽/槽形六角螺母.等级:900 MPa(环境温度)/650℃;德文版EN 2809:2001