Patent ID: 6081994
Filing Date: 2000-07-04
Classification: B23P,F16B,Y10T

Abstract:
A die member for attaching a fastening element to a plate-like element, said fastening element having an annular projecting pilot, a contact surface surrounding said pilot and an annular recess in said contact surface surrounding said pilot, said die member including an end face, an annular projection extending from said end face having an external diameter less than an internal diameter of said annular recess of said fastening element and adapted to be telescopically received in said recess, said projection having a free end and a bore extending through said annular projection having an internal surface including an internal diameter adjacent said free end greater than an external diameter of said annular pilot and adapted to be telescopically received over said pilot of said fastening element, said bore having a plurality of circumferentially spaced protrusions each extending radially from said internal surface including an end spaced from said free end of said annular projection and each having an internal diameter less than said external diameter of said annular pilot adapted to deform an external surface of said pilot toward a bottom wall of said recess and radially outwardly to form a plurality of projections overlying a bottom wall of said recess and a portion of said plate-like element located within said recess.