Coating Raw Material Coating Type Uncoated Zinc plated Yellow zinc plated Zinc nickel Raw Material 17 H D1dwemin.MSM8x111,614,38513M10x115,618,9517(16)M12x1,517,421,1619(18)M14x1,520,524,49722(21)M16x1,522,526,75824M18x1,524,929,56927M20x1,527,732,951030M22x1,529,535,031132(34)M24x1,533,239,551236M30x1,542,750,851546