Patent ID: 8777536

Claim:
Nut which can be inserted into a hole in a workpiece, comprising: a body having an upper portion and a lower portion and defining a centerline extending through said upper portion and said lower portion, said body having a periphery; said periphery of said body at said lower portion having an outer surface which is angled relative to said centerline at an angle of any one of 20 to 50 degrees, said outer surface extending downwardly from said upper portion of said body; an undercut formed in the lower portion of said body, said undercut radially opening in an axial direction of the body, said undercut formed of an upper delimiting surface extending from said outer surface such that an upper edge of said outer surface is positioned radially outside the undercut, said upper delimiting surface continuously encircles said body and is angled at a constant angle relative to the centerline of said body, and said undercut further being formed of a lower delimiting surface which continuously encircles said body and is angled relative to the centerline of said body, wherein said undercut is adapted to receive a cold flow of metal of the workpiece when the nut is inserted into the hole in the workpiece and wherein said nut is rotatable within the workpiece while being secured against substantial axial displacement relative to the workpiece after said nut is inserted into the hole in the workpiece and receives the cold flow, and wherein the nut is devoid of prongs.