EN 4297:2017 航空航天系列 六角螺母,塑料环自锁,标准高度,标准对边,耐腐蚀钢,钝化 等级:900 MPa(在环境温度下)/120°C
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