Specifications DIN6923 flange nut 1.Metail:Carbon steel,stainless 2.Size:M3 ... 3" 3.Standards:DIN ,ANSI/ASME,BS,GB HEXAGON NUTS WITH FLANGE Standard:DIN6923, IFI 1986 D-12Class:6/8 Gr ... , JIS, AS, GB,Non-standardSizeM6~M24SurfacePlain, Zinc(Yellow Zinc, White Blue Zinc), Black, DakeluoGrade of Strength4,6,8,10,12MaterialCarbon ... /C,T/TThe delivery time20days after order confirmation serrated flange nuts