Abstract: A pin element of the type used in a multiple pin electrical connector comprises an inner conductive portion formed of three helically wound oxygen free copper wires, and an outer conductive portion formed of a cluster of equal diameter outer wires helically wound around the inner portion for frictionally engaging a socket. From 25% to 70% of the outer wires are formed of beryllium copper and the remaining outer wires are formed of oxygen free copper to reduce engagement forces while maintaining minimum separation forces.

Abstract: A releasable key arrangement for an edgeboard connector includes a support member having a bore extending completely through the support member. A polarizing key is mountable to the support member. A threaded retaining member is normally mounted in the key and threadedly connectible to the support member to connect the key thereto. Threads on the retaining member are short enough in the axial direction to be disposed externally of the key when the key has been connected to the support member. Alternatively, the retaining member can be rotatably mounted within the support member and constrained against axial movement, and is threadedly securable to the key. A leader pin and leader bushing are connectible to the connectors to assure proper alignment of contact elements during initial testing.