Self-locking electric connector

A self-locking electrical connector comprising:

• a first connector element having a housing for receiving contacts, said 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 axially directed ratchet indentations angularly distributed about the connector axis,
• a second connector element having a body formed with an external thread for cooperation with said bush, and
• a spring washer axially retained between said stop ring and said flange, having a plurality of keying fingers engaged into the slots for preventing mutual rotation of the housing and spring washer, axially curved away from the housing between the fingers and formed with projecting deformations located midway between the fingers, said deformations being constructed and arranged for engagement into the ratchet indentations by the resiliency of the washer,
• wherein windows parallel with the axis are formed in the bush at a position such that the flange appears across the windows when the screwed connection is fully tightened.