NO 331 – ISO/EN U2 union flat seat F x M Material: malleable iron, black or hot dipped galvanized Thread: ISO 7-1 Working pressure: max. PN 25 (-20 °C to +120 °C) Unions supplied without gasket Available options Available Options: You may also like… Select optionsThreaded flange EN 1092-1 Typ 13 (DIN 2566) Choose optionHemp / Flax Choose optionFemale coupling made of brass Choose optionBrass ball valve with female thread