Electric feedthrough for use in gastight enclosures has a generally cylindrical, molded body with a molded housing head carrying screw-type electrical connections. An O-ring is situated between the head and a nut threaded to mate with the threads on the housing body so that the nut can be screwed up to form a hermetic seal in the barrier wall of an opening. The screw-type terminations are located at radial distances from the center of the body at least as great as the radius of the body passing through the barrier wall.