... ASTM,ISO. 3)Material:Carbon Steel SpecificationsNuts and Bolts 1)Size:M6-M30,in all length 2) ... 3)Material:carbon steel,c1010,c1008.Nuts and Bolts SizeStandardMaterialGradeSurfacePackingM6DIN933C10083.6Yellow Zinc25kg boxM8-M20DIN931C10104.6Blue Zinc4 box ... 6.8Size:M6*16-50 M8*20-100 M10*20-100 M12*20-100 M14*30-100 ... ,zinc plated(yellow,blue)Size:M8*55-120 M10*60-120 M12*60-120 MM14*55-120 ...