A modified version of the standard 3.5mm 3-pole plug, with an threaded locking-ring added, to enable a secure mating with those 3.5mm sockets which have an external screw thread. This type of connector is being used increasingly with radio microphone bodypack transmitters, such as those used on the Sony Freedom and Sennheiser Evolution series. Maximum cable entry 5.0mm diameter. Black metal body.
For mating in-line sockets, see CANFORD MINIATURE JACK SOCKETS - Locking - 3-pole, in-line