1.ISO 9001:2008 and RoHs 2.Stainless Steel material 3.OEM order is welcomed JL-SCR-033 ... OEM Hex NutMaterialIron, Brass, Carton steel, Stainless steel, Alloy steelSurface TreatmentChrome plating, Silver plating, Zinc plating, ... of drive insertsPhillilps, Slotted, Pillips/slotted combination, Cross recess type, H drive, Hexagon socket, Square socket, Torx, Triangle drive, Indented ...