... 2. Strict quality control 3. ISO9001-2008 galvanized square U shaped bolt (ISO9001-2008) Production Description Haiyan Hongtai Metal ... galvanized,blackening, electroplate…3) machining Process:Stamping , turning,tube bending, welding, milling, CNC lathe…4) usage of ... products are stampings, furniture hardware, machine part, Auto part,tube bending ,welding part4. Used in the machinery, construction, ...