Abstract: The invention is an apparatus for releasably connecting a first structure to a second structure. In detail, the invention includes the first structure having a first cavity extending inward from a surface thereof. An inward facing circumferencial lip is mounted in the first cavity in proximity to the first surface forming a restricted opening having a first diameter. The second structure includes a second cavity extending inward from a surface of the second structure. A hollow tubular member having first and second ends is movably mounted within the second cavity, with the tubular member movable from a retracted position to an extended position. The first end of the tubular member is in the form of a collet movable between a retracted position and an expanded position in contact with the lip in the first cavity when the tubular member is in the extended position.