Structure for fastening articles to thin walls and method for manufacturing such structure

Claim 1

A PROCESS FOR MANUFACTURING A FASTENER ASSEMBLY WHICH INCLUDES A RELATIVELY THIN WALL HAVING ONE FACE AND ANOTHER FACE AND TO SAID ONE FACE OF WHICH AN ARTICLE IS TO BE FASTENED, COMPRISING THE STEPS OF FORMING IN SAID WALL SUBSTANTIALLY CIRCULAR OPENING AND PRESSING A POLYGONAL NUT HAVING A THICKNESS WHICH IS SMALLER THAN THE THICKNESS OF SAID RELATIVELY THIN WALL AND HAVING A MINIMUM OUTER DIAMETER WHICH IS SUBSTANTIALLY EQUAL TO THE DIAMETER OF SAID CIRCULAR OPENING INTO SAID OPENING FROM THE OTHER FACE OF SAID RELATIVELY THIN WALL WITH SAID NUT ARRANGED SUBSTANTIALLY COAXIALLY WITH SAID OPEHNING, AND TO A DEPTH WHICH IS SMALLER THAN THE THICKNESS OF SAID RELATIVELY THIN WALL SO THAT IN THAT PORTION ADJACENT TO THE OTHER FACE OF SAID WALL WHICH IS NOT PENETRATED BY SAID NUT INWARDLY PROJECTING WALL PORTIONS WELL BE FORMED BY THOSE PORTIONS OF THE NUT WHICH EXTEND BEYOND THE DIAMETER OF SAID OPENING, SAID INWARDLY PROJECTING WALL PORTIONS BEING ADAPTED TO SUPPORT SAID NUT WITHIN SAID OPENING AND PREVENT ITS PASSING THROUGH SAID OPENING WHEN AN ARTICLE IS FASTENED TO SAID ONE FACE OF SAID THIN WALL BY A SCREW PASSING THROUGH SAID OPENING AND ENGAGING SAID NUT EMBEDDED IN SAID THIN WALL.