731829000000 under HS Code Others, 731816920000 under HS Code Others, and 731821000000 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 : SPRING WASHERS AND OTHER LOCK WASHERS. were the top exported HS Codes by C.V.T.CIVATA VIDA SANAYII VE TICARETLTD.STI. in 2021.