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