A terminal 10 includes a terminal body 11, made of electrically-conductive metal, and a stopper body 13 made of an insulative resin. That portion of the terminal body 11, extending from its distal end 11a to its proximal portion 11b, is formed into a generally-cylindrical tubular shape, and a slit-like guide groove 11c is formed through this generally-cylindrical tubular portion, and extends along a length thereof. The stopper body 13 includes a generally-cylindrical connecting portion 13a, an insulating projected portion 13b of a generally conical shape, formed at a distal end of the connecting portion 13a, and a retaining ring portion 13c of a generally annular tubular shape formed at a proximal end of the connecting portion 13a. A guide ridge 13d is formed on the connecting portion 13a of the stopper body 13, and can be positioned relative to the guide groove 11c so as to be fitted in this guide groove, and with this construction, the generally-cylindrical connecting portion 13a of the stopper body 13, extending between the insulating projected portion 13b and the retaining ring portion 13c, can be fitted in the generally-cylindrical tubular portion of the terminal body 11 extending from the distal end 11a thereof to the proximal portion 11b thereof.
A cable assembly for an electrosurgical pencil comprises a power and signal transmitting multiple-core cable with an attachment plug, in which the power transmitting core has more conductors and thicker insulation than the two signal transmitting cores. The attachment plug has plastic plug-pins with spring-steel strips, or has metal plug-pins with recesses on the plug body near the plug-pins, to increase the flexibility to mate with any loose or tight socket. The cable assembly of this invention is cheaper in cost, lighter in weight, thinner in outside diameter, more flexible in total length and provides a more stable plug-socket connection.