73182200 under HS Code SCREWS, BOLTS, NUTS, COACH-SCREWS, SCREW HOOKS, RIVETS, COTTERS, COTTER-PINS, WASHERS (INCLUDING SPRING WASHERS) AND SIMILAR ARTICLES, OF IRON OR STEEL - NON-THREADED ARTICLES : OTHER WASHERS, 73181590 under HS Code Others, and 78060040 under HS Code Others were the top imported HS Codes by A CHAU MEDICAL EQUIPMENT AND SERVICES JOINT STOCK COMPANY in 2021.