BS EN 4846:2022
航空航天系列 螺钉 盘头 螺旋驱动凹槽 螺纹连接头 采用耐热耐腐蚀钢制成 经过钝化处理 分类:1100MPa(环境温度)/425 °C
Aerospace series. Screws, pan head, Spiral Drive Recess, threaded to head, in heat and corrosion resisting steel, passivated. Classification : 1 100 MPa (at ambient temperature) / 425 °C