A connect/disconnect, lock/unlock and hold mechanism for mechanical, electromagnetic shielding, electrical conductivity, and thermal dissipation coupling with environmental sealing, the mechanism comprising:
- a cylindrical body having a circumferential groove means therein with generally parallel side walls;
- a continuous coil spring disposed in said circumferential groove means with a portion thereof protruding from said circumferential groove means;
- a housing having a bore therein sized to accommodate said cylindrical body and groove means, disposed in an inside surface of said bore, for receiving the protruding spring portion and for enabling assembly of the cylindrical body within the bore when the cylindrical body and housing are moved in one direction with respect to one another;
- and
- means, defining a tapered bottom in said circumferential groove means, for preventing the spring from turning past a vertical line when the cylindrical body and housing are moved in another direction with respect to one another in order to prevent disassembly of the cylindrical body and housing.