DIN EN 4069:1996-03 航空航天系列 - 螺母,六角形,普通,减少高度,减少对边,耐热钢,钝化 - 分类:600 MPa(环境温度)/650 °C
Aerospace series - Nuts, hexagon, plain, reduced height, reduced across flats, in heat resisting steel, passivated - Classification: 600 MPa (at ambient temperature)/650 °C; German version EN 4069:1996