How many types for stainless nut?

     As wildly used in mangy fields like shipbuilding, construction, iron steel, stainless nuts mainly have following types: hex nuts (GB6170/DIN934), thin nuts (GB6172/DIN439), heavy nuts (metric, U.S.), nylon lock nut (DIN985-DIN982 thick), all metal lock nuts (DIN980M), cover type nut (DIN1587 ), flange nuts (GB6177/DIN6923), flange nut nylon lock nut (DIN6926), square weld nut (DIN928), hexagon weld nut (DIN929), butterfly cap (GB62, DIN315, American), K hat And so on. Size: M1.6-M64.