DIN EN 4297-2017 航空航天系列. 钝化耐腐蚀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 4297-2017
Aerospace series - Nuts, hexagon, self-locking by plastic ring, normal height, normal across flats, in corrosion resisting steel, passivated - Classification: 900 MPa (at ambient temperature) / 120 °C; German and English version EN 4297:2017