Container having at least one filling opening with a threaded closure

A sheet-metal container, comprising:

• a container body composed of sheet metal and having top and bottom walls;
• a tubular fitting projecting outwardly from said container body formed from the sheet metal of one of said walls and unitary therewith, said tubular fitting having a bend at its junction with said one of said walls;
• a threaded bushing received in said tubular fitting and formfittingly engaged therein, said bushing being provided with an internal screwthread, an outwardly extending flange on one end formfittingly engageable with said bend, and another end opposite said one end;
• means forming an annular enlargement on a free end of said tubular fitting, said enlargement being a bulge projecting inwardly to overhang said other end of said bushing;
• and
• a closure stopper threadedly received in said tubular fitting and having an external screw thread threaded into said internal screwthread, an annular shoulder juxtaposed with said annular enlargement, and an annular seal clamped between said shoulder and said enlargement, said stopper drawing said flange against said bend and said other end against said enlargement, said other end having an outwardly concave shape complementarily engaging an inwardly convex portion of said bulge.