Abstract: An apparatus for closing the open end of a foot on a piece of tubular furniture having a cap (10) for a piece of tubular furniture (20), a butt portion (22), a bottom (24), an inner wall (26), and an outer wall (28). A threaded insert (30), preferably metallic, is molded into bottom portion (24). When inserted into a foot (15) of a piece of tubular furniture (20), inner wall (26) and outer wall (28) engage foot (15) in a two-sided friction fit, and a threaded glide or caster (40) is inserted through foot (15) and threaded insert (30), further securing cap (10) to foot (15) and providing easy movement and leveling of furniture (20).