UNE-EN 60169-25
RADIO-FREQUENCY CONNECTORS. PART 25: TWO-POLO SCREW (3/4-20 UNEF) COUPLED CONNECTORS FOR USE WITH SHIELDED BALANCED CABLES HAVING TWIN INNER CONDUCTORS WITH INNER DIAMETER OF OUTER CONDUCTOR 13,56 MM (0,534 IN) (TYPE TWHN). (Endorsed by AENOR in November of 1995.)