BS EN 4163:2016
航空航天系列.镀镉合金钢长螺纹粗公差标称柄偏十字形凹槽埋头100°螺钉.分类:1100MPa(室温)/235℃
Aerospace series. Screws 100 countersunk normal head, offset cruciform recess, coarse tolerance normal shank, long thread, in alloy steel, cadmium plated. Classification: 1 100 MPa (at ambient temperature) / 235 C