UNE-EN 61169-29
Radio-frequency connectors - Part 29: Sectional specification - Miniature radio frequency coaxial connectors model screw, snap-on, push-pull or quick-lock, slide-in (rack and panel applications) - Characteristic impedance 50 ohms (type 1,0/2,3) - 50 omhs and 75 ohms applications (Endorsed by AENOR in July of 2009.)