... 3.surface: galvanized 4.over ten years supplier serrated Flange Locking Nuts, ZincMaterial:stainless steel,steel,iron,copper,aluminumDia:M5- ... 000 pcsStandard:JIS,BS,ISO,DINPacking:carton box,poly bag,and paper bag,or according to the customers'requirementThe products ... have excellent quality and competitive price.trade term: Ex works,FOB,C&F, ...