Abstract: A pair of telescoping members include interconnecting end portions having a preselected configuration that facilitates the insertion of one tubular end portion into the other tubular end portion. The surface configuration of the interconnecting end portions is complementary so that the surfaces on an inner member engage the surfaces on the outer member to permit the transmission of rotation from one telescoping member to the other while permitting relative longitudinal movement therebetween. The inner and outer connecting members are spaced apart to form an annulus therebetween and provide a degree of tolerance greater than the tolerance provided with conventionally machined telescoping connecting end portions. The tolerance is taken up by the injection of a thermosetting resinous material at an elevated temperature into the annulus, completely filling the annulus.