A coaxial cable termination device includes a barrel having opposed front and rear ends and a circumferential channel. A collet is at the front end of the barrel, and a sleeve is mounted over the barrel for reciprocal movement between a retracted position, in which the sleeve allows expansion and compression of the collet, and an advanced position, in which the sleeve prevents expansion of the collet. A locking mechanism is formed integrally in the sleeve and includes an arm mounted at a living hinge for movement between an unlocked position and a locked position in which a tooth on the arm is disposed within the circumferential channel. A lever is opposite the tooth from the living hinge and releases the arm from the locked position thereof.