BS 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 ℃
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