Centre pin is Brass.
Suits cables: RG58
GME AS004B BLACK HEAVY DUTY ANTENNA SPRING, CABLE & PL259 PLUG AE4013B AE4401B AE4701B AE4704B AW4704B AE4705B AW4705B AE4706B AW4706B
GME AB004 ANTENNA BASE CONNECTOR SUITS AE47XX ANTENNA & MOST GME SPRINGS
GME ABL004 ANTENNA BASE & LEAD WITH PL259 CONNECTOR TO SUIT AE4700 ANTENNAS
GME ABL004 ANTENNA BASE & LEAD TO SUIT AE4700 ANTENNAS
RFI MBC-00-53 MBC SO239 ANTENNA BASE & LEAD, 5M, OPTIONAL CONNECTOR/S