标准查询
GB/T 819.2-1997 十字槽沉头螺钉 第2部分:钢8.8、不锈钢A2-70和有色金属CU2或CU3
(DIN EN ISO 7046-2 | )
Cross recessed countersunk flat head screws (common head style)-Grade A-Part 2:Steel of property class 8.8, stainless and non-ferrous metals