Example of designation, together with: sleeve, swivel, ring, pressure screw (screw 5 x 10 UNI 252). Materials: for the sleeve: brass Ot 67 UNI 1696; for the walker: malleable cast iron gm 35 UNI 3779; for the ring: 37 UNI 743 steel; for the pressure screw: brass Ot 58 UNI 2012, annealed.
UNI 4199-1959 history
1959UNI 4199-1959 Nozzle for hose pipe connected to railway station water supplies for filling water tanks of railway carriages.