Example of designation with component parts: flange, filter, connection. Materials: for the flange and for the connection: brass Ot 67 UNI 1696; for the crown and the filter mesh: brass Ot 63 UNI 2012, annealed; for the bolts: 37 UNI 743 steel. For the outlet of the flexible hose connected to the water main: UNI 4199.
UNI 4198-1959 history
1959UNI 4198-1959 Railway carriage water tank filling hose nozzle.