Mongolia Exports of screws, bolts, nuts, coach screws, screw hocks, rivets, of iron or steel to China was US$766 during 2021, according to the United Nations COMTRADE database on international trade. Mongolia Exports of screws, bolts, nuts, coach screws, screw hocks, rivets, of iron or steel to China - data, historical chart and statistics - was last updated on May of 2024.