... :Low/middle carbon steel,alloy steel,stainless steel304/316,201 zinc plated threaded rod DIN975Material: Low carbon steel, middle carbon steel, alloy ... .5, 6.8, 8.8, 10.9, 12.9 Surface: Zinc plated(yellow, black, green), black oxide chrome plated, Cr+3, hot dip galvanized Packing ... poly bag or plastic box.3)As per customers' requirement zinc plated all thread rods B7