Electrical connector having a threaded ring and means for retaining it in locked condition

Electrical connector having:

• body means for receiving electrical contacts;
• a threaded rotary locking nut for cooperation with a threaded portion of a matching connector, said locking nut being retained against forward axial movement beyond a predetermined position on said body means;
• a ratchet washer axially slidable on and non-rotatably connected to said nut and formed with axially directed ratchet teeth having edges each separating a cam face with a lower slope from a ratchet face with a steeper slope relative to a circumferential direction;
• a separate one-piece ring of synthetic material having a radially inner portion for secured connection with said body means and an outer portion formed with additional teeth for engaging said ratchet teeth to establish a ratchet effect that opposes rotation of the ring in an unscrewing direction in which the additional teeth come into abutment against the steeper sloping ratchet faces;
• and
• a spring wavy metal washer interposed between said ratchet washer and said nut for exerting an axially directed force on said ratchet washer applying the latter against said ring.