... ,GB HEXAGON NUTS WITH FLANGE Standard:DIN6923, IFI 1986 D-12Class:6/8 Gr.2/Gr.5Material:Steel/Stainless Steel/BrassDiameter:M4 ... , Zinc(Yellow Zinc, White Blue Zinc), Black, DakeluoGrade of Strength4,6,8,10,12MaterialCarbon steel (SWARCH8A, SWRCH35K, Q195LY, 45#)PackingBoxes+cartons ...