Abstract: A connector for mating a plurality of male and female electrical contacts has two tubular telescoping body portions and an annular collar surrounding them. A spring is confined inside the collar with its ends engaging the collar and a first body portion so as to yieldingly resist rotation of the collar relative to the first body portion. Axially opposed camming tabs on the collar and second body rotate the collar as the bodies are telescoped to a latching position of the tabs locking the connector bodies in mated contact position.

Abstract: A connector for mating a plurality of male and female electrical contacts has two tubular telescoping body portions and an annular collar surrounding them. A spring is confined inside the collar with its ends engaging the collar and a first body portion so as to yieldingly resist rotation of the collar relative to the first body portion. Axially opposed camming tabs on the collar and second body rotate the collar as the bodies are telescoped to a latching position of the tabs locking the connector bodies in mated contact position.

Abstract: According to the invention a high voltage electrical coupling for attachment through a wall comprises a coupling body around a high voltage conductor and having a flange abutting one side of the wall and an external thread extending from the flange through the wall; and a nut with internal threads screwing onto the external thread and a face abutting the other side of the wall; wherein at least one of said body and nut is of dielectric material and the nut has air channels in its abutting face extending outwardly from its internal threads to its exterior for releasing air from the threads and face when the nut is screwed into abutment with the wall.