20 as best seen in fig1 and 3 of the drawings which also is a conically shaped section sloping toward the axially inner surface 12 the integrally formed flange 20 is formed such that the small conjugate plane 22 of the conical section has an inside or bore diameter greater than that of the groove diameter of the threads on the axially inner surface 12 this is important from a manufacturing standpoint since an object of the present invention is to allow the subject lug nut 10 to be manufactured on standard nut manufacturing equipment thus clearance of the integrally formed flange 20 is necessary to allow complete threading of the axially inner surface 12 through its entire length without interference since the groove diameter of the threads in the axially inner surface 12 is smaller than the inside diameter of the small conjugate plane 22 the large conjugate plane 24 of the conical section provides a seat 26 at the top of the threads within the axially inner surface 12 this seat provides a stop or resting place for the insert 28 which is to be placed in the end or crown of the lug nut 10 insert 28 has a circumferential flexible slightly conical flange 30 attached thereto so as to allow it to be snapped into the integrally formed flange 20 the circumferential flexible slightly conical flange 30 must have sufficient flexibility and sufficient structural integrity to allow compression fitting of the insert 28 into the integrally formed.