Abstract: An electrical connector assembly adapted for longitudinal telescoping engagement includes first and second identical insulating connecting housing portions containing rigid contact terminal members. The insulated connecting housings surrounding and enclosing the terminal members are composed of a polycarbonate resin material and are adapted to receive and fixedly hold a U-shaped spring member which engages the end of the terminal member to bias and hold the same in rigid contacting position. The housing includes also a removable insulating wall member which is engageable with the terminal members when the terminal members have been fully inserted into the connecting housing to assist in retaining the terminal members in rigid contact position. The wall member is a thermoset high heat resistance glass filled nylon material which prevents disintegration of the connecting housings upon extended use of the electrical connector assembly.