... Drawing or Samples 4,ISO, MTC metal good surface polishing nuts Production range:We are a professional manufacturer of die casting with ... to the dimension tolerance of machining of customers’ requirement.4, Surface roughness: Ra0.8-3.25, Weight: ranging from 0.50g ... to 10000kg6, Surface finish: polishing, oiled (rust-prevented), zinc-plated, nickel-plated, chrome ...