is designed to be smaller than the inner diameter of the heat shrinkable tube so that the tube may be slipped over the tube like portion of the boot although the tube like portion of the boot shown in the figures to have a circular cross section it will be readily apparent that its outer surface need not be circular for example the outer surface may be elliptical rectangular hexagonal etc whatever the shape of the tube like outer surface it is required that the largest diametrical distance eg the diagonal if a square outer surface is employed or the effective outer diameter be smaller than the inner diameter of the heat shrinkable plastic tube the flange 19 is integral with and surrounding the outer surface of the trailing end of the tube like portion 18 in the fig1 embodiment of the invention the flange 19 is integral with cap 20 having internal threads therein which mate with the external threads 21 on the socket nose in the fig2 embodiment the flange 19 has been drilled to receive bolts 22 for securing it to the socket nose this embodiment is particularly useful in connection with terminations which generally have a limited amount of space available for installing a boot eg such as bridge terminations a bridge termination is shown in an elevation view in fig3 a and an end view in fig3 b in this embodiment the flange 19 has a configuration which allows the boot.