hot forged steel heavy hex nut: 1)material:ductile iron,steel 2)Process:CNC ... machining 3)Standard: according to customer hot forged steel heavy hex nut1)Material: stainless steel, alloy steel, grey iron, ductile ... ), zinc-plated, nickel-plated, chrome-plated, hot-galvanized, sandblasting, painting, powder-coating.7) Accuracy±0.01mm Hot forged steel heavy hex nut