The complete fitting SMS (Swedish Metric Standard) is composed of a ferrule, which is internally threaded, and characterised by grooves for the mechanical closing (Swivel), a smooth pipe coupling (male part), which is connected (through the screw-shaped coupling) with a threaded pipe coupling (female part), where is located the gasket. In particular, the fitting SMS is used in the food-, dairy- and chemical sector. This fittings’ typology allows to have a fast connection and the guarantee of an efficient hold.