A connector assembly configured to sealably engage with a mating connector, the mating connector having a cavity defined by an inner wall surface, the connector assembly comprising: a plug body having a loading end and a mating end and a central axis extending therebetween, the mating end being configured for insertion into the cavity to establish at least one of a communicative and power connection, the plug body having an outer surface including a plurality of ramp elements that are located proximate to the mating end and project radially outward from the outer surface, a sleeve member surrounding the outer surface of the plug body, the sleeve member including a base portion that extends around the central axis and includes an inner surface, the sleeve member further comprising a plurality of fingers that extend toward the mating end, each finger being biased toward the central axis, and a collar operatively coupled to the sleeve member and configured to rotate the sleeve member about the central axis when the collar is rotated between a withdrawn position and a locked position, wherein each finger engages a corresponding ramp element when the collar is rotated to the locked position, the fingers flexing away from the central axis and pressing against the wall surface of the mating connector when the collar is rotated to the locked position, characterised in that firstly the base portion of the sleeve member includes two ends (520, 522) which form tabs (521, 523) respectively that project radially outward from the base portion and are separated by a tab separation distance (D 3) and secondly the collar includes a slot having a slot width (W 1) that receives the tabs (521, 523), wherein the tab separation distance (D 3) is less than the slot width (W 1). a plug body having a loading end and a mating end and a central axis extending therebetween, the mating end being configured for insertion into the cavity to establish at least one of a communicative and power connection, the plug body having an outer surface including a plurality of ramp elements that are located proximate to the mating end and project radially outward from the outer surface, a sleeve member surrounding the outer surface of the plug body, the sleeve member including a base portion that extends around the central axis and includes an inner surface, the sleeve member further comprising a plurality of fingers that extend toward the mating end, each finger being biased toward the central axis, and a collar operatively coupled to the sleeve member and configured to rotate the sleeve member about the central axis when the collar is rotated between a withdrawn position and a locked position, wherein each finger engages a corresponding ramp element when the collar is rotated to the locked position, the fingers flexing away from the central axis and pressing against the wall surface of the mating connector when the collar is rotated to the locked position, characterised in that firstly the base portion of the sleeve member includes two ends (520, 522) which form tabs (521, 523) respectively that project radially outward from the base portion and are separated by a tab separation distance (D 3) and secondly the collar includes a slot having a slot width (W 1) that receives the tabs (521, 523), wherein the tab separation distance (D 3) is less than the slot width (W 1).