In descending order according to figures of 2017

Import

HS 7318 Screws, bolts, nuts. Coach screws, screw hooks, rivets, cotters, cotter-pins, washers(including spring washers) and similar articles, of iron or steel

Export

HS 7318 Screws, bolts, nuts. Coach screws, screw hooks, rivets, cotters, cotter-pins, washers(including spring washers) and similar articles, of iron or steel

Source: Bureau of Foreign Trade (Taiwan)