In one embodiment of the invention the insert includes a split annular flange located on one of its ends and in another embodiment of {HEAD ~ the invention} the insert includes {TAIL ~ a split annular flange} located on both of its ends 
In one embodiment of the invention the insert includes a split annular flange located on one of its ends and in another embodiment of { HEAD ~ the invention } the insert includes { TAIL ~ a split annular flange } located on both of its ends
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH