Hexagon flange bolts with serration DIN 6921 Steel 8,8 Zinc plated М8*30 - 10 000 pcs М8*25 - 100 000 pcs М10*35 - 100 000 pcs М10*30 - 70 000 pcs Hexagon nuts with flange and serration DIN 6923 Steel class 10 Zinc flake coating flZnnc-720h М10 - 400 000 pcs