the second engaging piece 103 b extending a bent second flange 108 the first engaging piece 103 a and the second engaging piece 103 b could be interlocked with each other by dovetail grooves to form a front bottom engaging portion and along with the upper plane piece 101 as well as the two side plane pieces 103 to define a space for the insertion hole 30 after the first engaging piece 103 a and the second engaging piece 103 b are interlocked with each other to form an engaging portion the first flange 107 and the second flange 108 are juxtaposed to form a flange portion when the connector is mounted onto the circuit board of the smt type the flange portion can be inserted into the predetermined hole on the circuit board of the smt type with the leg 21 of the housing 20 a and two pairs of downward extending projecting members 104 a 105 a inserted into the respective holes in the smt circuit board as a result the bottom of the horizontal portion 222 of each terminals 22 will be well connected to the respective contacts in the smt type circuit board and can achieve an excellent electrical connection by soldering it results in the insertion hole 30 on the front part of the connector being well supported as well as a result the receptacle can endure repeating plug unplug actions from the mating connector the present invention still has other various embodiments as shown in fig3 it is a perspective view of another preferred embodiment of the present invention in the present embodiment on the appropriate position of the first flange 107 and the second flange 108 respectively having a.