A housing a housing container, a housing cover configured to close an open end of the housing container and a snap-fit fastener that secures a rim of the housing cover to a sidewall of the housing container. The housing container includes a base and a sidewall that protrudes from the base. The fastener includes an elastic clip that is disposed on an outer surface of the sidewall and a rigid lug that protrudes from the cover and engages the clip. The clip has a U-shaped plate portion that extends in parallel to the sidewall and defines clip opening. The lug includes a ridge that protrudes into the clip opening and engages the plate portion. The plate portion is dimensioned so that an outer edge of the plate portion is disposed no further from the container base than the sidewall free edge.