... sample 3.surface: galvanized 4.over ten years supplier serrated Flange Locking Nuts, ZincMaterial:stainless steel,steel,iron,copper,aluminumDia:M5 ... ,black oxide,chrome platedMin Order:100,000 pcsStandard:JIS,BS,ISO,DINPacking:carton box,poly bag,and paper bag,or according ... ,CIFfree charge of sample sample lead time: within days serrated Flange Locking Nuts, Zinc