A ruggedized PCMCIA card (PC card) connection adapter device includes a rigid housing having a PC card interface assembly and a external component interface assembly. Each interface assembly extends through an associated exterior surface of the housing, and the assemblies are linked to allow transfer of input/output signals therebetween. The PC card interface assembly includes a linking member sized and shaped to fittingly engage the PC card socket of a host computer. A gasket member disposed on the linking member provides a seal between the PC card socket and the linking member when the connection adapter is in place. The rigid housing is permanently affixed to the host computer.