BS EN 4161:2010
航空航天系列.鍍鎘合金鋼長螺紋粗公差標稱柄偏十字形凹槽平頭螺釘.等級:1100MPa(室溫)/235℃
Aerospace series - Screws, pan head, offset cruciform recess, coarse tolerance normal shank, long thread, in alloy steel, cadmium plated - Classification: 1100 MPa (at ambient temperature) / 235 °C