DIN EN 4309-2017 航空航天系列. 镀镉合金钢标称对边标称高度的塑料环自锁六角螺母. 分类: 900 MPa (环境温度下)/120 ℃; 德文和英文版本EN 4309-2016
Aerospace series - Nuts, hexagon, self-locking by plastic ring, normal height, normal across flats, in alloy steel, cadmium plated - Classification: 900 MPa (at ambient temperature) / 120 °C; German and English version EN 4309:2016