Called the ‘U contact’, or tuning fork contact, blades on the inside edge of the stamped BeCu contact cut or ‘displace’ the cable’s insulation exposing the wire inside. In this example of a cross section as seen through a microscope, the PVC insulation around the second stranded wire bundle has been displaced, creating a permanently stable and gas-tight connection. The first and third conductors are not terminated along this row, but in the adjacent row, since the contacts are offset by .050 inches. IDC refers to the termination end of the contact. The other end of the contact wipes against the header pin to complete the circuit. Socket contacts can be single or dual wipe according to the requirements of the application.