73181510 under HS Code Others, 82079000 under HS Code Others, and 73182400 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 : COTTERS AND COTTER-PINS. were the top exported HS Codes by B&H TECH CO LTD in 2021.