... us.product specificationsItem.NOHHC-028E NameCNC Hex NutMaterialIron, Stainless Steel, Brass, Al, Copper, etc.Surface treatmentZinc, ... description 1. Raw material: Iron, Steel, Galvanized steel, Cold Rolled Steel (CRS), Mild steel, Stainless steel, Aluminum, Phosphor Copper, Brass, etc ... ,thermostat,switch.3.The materials of flanges are stainless steel, steel, copper, brass, aluminum, etc..4.With ...