... specificationsItem.NOHHC-008ONameHigh Precision clamp boltMaterialIron, Stainless Steel, Brass, Al, Copper, etc.Surface treatmentZinc, Copper Nickel, Chrome, Tin, ... Steel (CRS), Mild steel, Stainless steel, Aluminum, Phosphor Copper, Brass, etc. (According to customer's demands)2. ... Surface finish: Zinc, Nickel, Chrome, Tin, Silver, Copper, Gold Plated, Painting, Anodizing Heat treatment, Black Oxid( ...