Abstract: A rugged and long-lasting mounting for a tubular metal leg to the underside of a furniture unit through the intermediary of a sheet metal supporting bracket affixed to the latter, with spaced arms extending downwardly and parallely from the opposite sides of a sheet metal supporting plate on the bracket adapted to abut closely the upper end of said leg. A flange extends inwardly from each of the arms at an acute angle thereto for sliding interengagement with correspondingly cut slots spanning opposed parallel chords on the leg which subtend substantial angles of about 90.degree., to bring the leg and plate into said close abutment while preventing loosening and eventual undesired disengagement therebetween in a direction transverse to said sliding interengagement.