In-line test connector which provides full access to all lines in a flat ribbon cable system. In use, the connector is inserted between mating system connectors, to provide external pin contacts that can be proved individually or connected to another cable assembly. Contacts are nickel-silver alloy. Body is glass-filled polyester. Standard 0.1 inch spacing between rows and between pins in row. Pin length is 6.1 mm. Overall depth of body is 16.5 mm