The end section is non displaceable in {HEAD ~ its fully inserted position} since {TAIL ~ the notch} lies within the opening shaft of the flat sleeve 
The end section is non displaceable in { HEAD ~ its fully inserted position } since { TAIL ~ the notch } lies within the opening shaft of the flat sleeve
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH