... 5.HS:830021000 1. Product details(1) Item name: Heavy-duty Ball Bearing Hinges with Zinc Plated (2) Material: Steel ... . Stamping, punching, bending, welding, threading, grinding, milling, machining, lathe, assembling etc. 3. Finishing: Anodizing, Powder-Coating, Zinc-Plated, ... and made of Moulds, and so on. These parts are used in Automotive, Electrical, Building, Furniture, Machine assembly, Computer ...