Background to the question: We have been importing lug bolts under a certain tariff heading which is under dispute :
The crux of the question is whether the lug bolt ( which we have ascertained is in fact a screw ) is deemed to be fully threaded or not. The definition of this would determine the tariff heading that would be applied. Namely a separate tariff heading for a screw that is fully threaded and a different one for a screw that is partially threaded. The question here is because of the design of this screw, namely with a seat is it considered to be fully threaded or not?
I have attached below a picture / link of the type of lug bolt I am talking about.