EN 2874:1996 航空航天系列.钝化耐热镍基合金制长双六角头紧公差标准柄中长螺纹螺栓.等级-1550MPa(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 - Classification: 1550 MPa (at ambient temperature)/315 °C