Click to enlarge
Vampire Wire's CM1F Chassis Mount RCA Female (Set of 2)
RCA by Vampire Wire
Designed to be the finest connector available. The #CM1F is gold plated and comes with a gold plated ground lug. Isolation washers are included. It is designed to fit on chassis that have used a connector with the mount nut on the inside of the chassis.
Priced per pair.