DIN EN 2653:1996 航空航天系列.钝化耐蚀钢螺纹长度接近顶部带槽100度沉头螺丝.等级:600 MPa(室温)/425℃
Aerospace series - Screws, 100° countersunk normal head, slotted, threaded to head, in corrosion resisting steel, passivated - Classification: 600 MPa (at ambient temperature)/425 °C; German version EN 2653:1996