NF L24-143*NF EN 4498:2006 航空航天系列 十字凹槽、紧公差标准杆、中等长度螺纹、大十二头耐热钝化镍基合金铝覆层螺栓 分类:1 550 MPa(环境温度)/315℃
Aerospace series - Bolts, large bihexagonal head, close tolerance normal shank, medium length thread, in heat resisting nickel base alloy, passivated, with aluminium pigmented coating - Classification : 1 550 MPa (at ambient temperature) / 315oC