BS EN 4498:2005
航空航天系列.有色铝涂层、钝化的、耐热镍基合金、中等长度螺纹、紧公差标称杆、大双六角头螺栓.等级:1550MPa(环境温度)/315°C
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) / 315 °C