Plug connector

A plug connector for cooperation with a socket connector (9) comprises a plug housing (2) having latch arms (22) with an end lug (29) for cooperation with an appropriate groove (95) in the socket connector (9), and being formed with a pair of split cross ribs (26) forming a gap (26a) therebetween. A CPA member (5) is provided for locking the connectors (1, 9) when mated, and comprises a pair of locking legs (50) and a pair of spring arms (53). The spring arms (53) each has a free end lug (54) and a nose (55) which projects inwardly so that, when the CPA member (5) and the plug connector (1) are in a pre-locked position, the nose (55) takes a short distance (d) to a support surface (20a) of the connector housing (20), and when there is a load well in excess of the mating a force onto the CPA member (5) in this condition, the noses (55) make a stop on the support surface (20a) to keep the CPA member (5) in the pre-locked position. When there is an excessive force placed on the CPA member, the spring arms (53) may slip into the gaps (26a) to prevent damaging of the CPA member (5).