Abstract: A crimpable terminal device in which the barrel is double walled, with the inner wall being formed from the same sheet of metal as the outer wall and being integral therewith. Specifically, the inner wall is formed by folding over extensions of the outer wall back upon the inner surface of the inner wall and then forming the resulting double thickness of metal into a barrel within which a wire is placed and the barrel crimped thereupon. The inner wall of the barrel can have slots or apertures therein or other irregular surfaces, all designed to bite into the conductor crimped therein to make good electrical and mechanical connection therewith. Because the inner wall has slots formed completely therethrough, and further because the inner wall can move relatively freely with respect to the outer wall, the crimping produces unusually good electrical and mechanical connections and with many side benefits.