Inner tube for screw jack

A tube assembly for use in a screw jack or the like, comprising in combination, a hollow tube member having an outer surface, a first inner surface, and a tube wall extending in thickness between the outer and first inner surfaces, the tube being provided at one end with a recess extending over a given axial distance within the tube from an outer tube end and being at least partly defined by a second tube inner surface located closer to the outer surface than the first inner surface, the tube wall thickness being correspondingly reduced at the recess location, and an annular bushing located within the tube member recess, the bushing being axially shorter than the annular recess by a distance substantially equal to the reduced thickness of the tube wall at the recess location, a tip portion of the tube recessed wall being crimped over the received bushing outer end to lock the bushing in the tube against relative tube member-bushing axial movement, a chordal portion of the bushing and a corresponding chordal portion of the tube member being displaced radially outwardly of the surrounding portions of the bushing and tube member to form an external tube assembly key and to lock the bushing in the tube member against relative tube member-bushing rotational motion.