An integral mandrel connector for co-axial cable. The connector has two major assemblies which telescope together and grip the prepared end of the cable. Elements of the connector tighten on the cable jacket and grip the cable center conductor, all simultaneously, when the two threaded assemblies are engaged and tightened together. A collar inside one assembly moves axially a short distance upon tightening of the assemblies to cause a chuck to grip the center conductor while the cable jacket is also being positively gripped by other connector elements. The connector can be employed for splicing two pieces of cable together, for adapting cable of one size to a different size cable, and for coupling to external equipment such as an amplifier.