EN 4312:2006
航空航天系列.带有铝涂料涂层的耐热和耐腐蚀钢制中等长度螺纹的粗公差异径柱螺纹.等级-1100mpa(室温)/315℃
Aerospace series - Studs, coarse tolerance reduced shank, medium length thread, in heat and corrosion resisting steel, with aluminium pigmented coating - Classification: 1100 MPa (at ambient temperature)/315 °C