The English nari or BS conversion is one of the conversions that connect threaded sections to the madegi. nari conversion BS Ariacoupling is designed and produced in Ariacoupling group in two types on the gear and inside the gear. This product, like other English fittings, is designed, manufactured and tested based on the requirements and standards of BS336. Ariakupling uses two types of aluminum alloy and a very strong copper-based alloy to produce BS male conversion, which has a very high resistance to environmental and corrosive factors.