stainless steel hexagon nut 1.Quality guarantee of ISOO9001 2.OEM service provided. 3.Material:200,300,400 series stainless steel hex nut1.Standard:GB,DIN,AISI,BA,ISO,JIS;2.Material:200,300,400 series;3.OEM service provided;4.Surface:bright,polished;5.Size:according to client's requirement;6.Quality:guarantee of ISO9001 stainless steel hex nut