Steel with a Zinc-Clear finish Partially Threaded Class 8.8 M16-2.0 thread, 120 mm length Class 8.8 steel hex head cap screws, M16-2.0, 120 mm length, zinc-clear coating. Made of heat-treated steel with a zinc-clear coating that offer good corrosion resistance and rust protection. These Class 8.8 metric screws correspond to Class 8 nuts. The fully threaded screws meet DIN 933, the partially threaded screws meet DIN 931.