Threaded fittings are intended for making dismountable connections with other fittings and threaded metal pipes. They can be used in any installation with a non-aggressive working medium. Threaded fittings in this category have a flat face (min. 3.0 mm wall thickness). This allows the fitting to be connected directly to a flexible, corrugated hose or to make another connection using a flat gasket. Threaded fittings for a flat gasket meet the requirements of EN 1254-4.