EN 4131:2009
航空航天系列.耐高溫鍍鋁鈦合金鋼中等螺紋粗公差標稱桿標準六角頭螺栓.等級-1250MPa(環境溫度)/425℃.合并勘誤表
Aerospace series - Bolts, normal hexagonal head, coarse tolerance normal shank, medium length thread, in heat resisting nickel base alloy, aluminium IVD coated - Classification: 1 250 MPa (at ambient temperature) / 425 Degrees C (Incorporating corrigendum