IMPORTS of screws from China have been slapped with a hefty antidumping duty this month after an investigation by a South African trade authority found they were causing local manufacturers “material injury”. The antidumping measures are seen as an extension of existing antidumping measures against Chinese manufacturers of nuts and bolts. The International Trade Administration Commission of SA (Itac) completed its preliminary investigation into the import of fully threaded screws with hexagonal heads, excluding stainless steel screws from China, and introduced an antidumping duty of 104,5% to protect the industry in the interim. This would allow it to finalise the investigation.