Abstract: A self-locking electrical connector comprises a first connector element having a housing including a radially directed flange formed with radial slots, an internally threaded locking bush rotatably and slidably received on the housing and a stop ring fixed to the bush and formed with ratchet indentations distributed about the connector axis, a second connector element has a threaded body. A spring washer is axially retained between the stop ring and the flange. It has a plurality of keying fingers engaged into the slots for preventing mutual rotation of the housing and spring washer, is axially curved away from the housing between the fingers and is formed with projecting deformations located midway between the fingers for engagement into the ratchet identations by the resiliency of the washer.

Abstract: An electrical connector has a socket member (1) with a body portion (2) having a tubular leading part (3) into which the tubular leading part (8) of a body portion (7) of a plug member (6) can engage. Locking is effected by means of a ring (11) which is retained on the plug member (6) and provided with an internal screw thread (14) co-operating with an external screw thread (5) on the leading part (3). When the ring (11) is screwed onto the socket (1) a leading end face (18) of the socket (1) is applied against an inclined face (17) of a tactile telltale (16) which is thereby urged outwardly of the ring (11) against the force of a return spring (19) to give a tactile indication to an inspector that the connector, which may be outside the field of vision of the inspector, is fully engaged.