供应标准(Standard): DIN124, DIN660, DIN674, ISO, GB863.1/863.2, ASME/ANSI B18.1.1/18.1.2/18.1.3M, JIS B1213, etc. 等级(Grade): 4.8, A2, A4 表面处理(Surface Finished): Plain, Zinc Plated, HDG 规格(Size): 1mm - 48mm, 1/4" - 2 " 材料(Material):Q195, Q235, Copper, Brass, SS304, SS316, etc.