a plurality of extensions integrally formed with {HEAD ~ said sleeve flange} and projecting inwardly toward the interior of said {TAIL ~ sleeve wall} 
a plurality of extensions integrally formed with { HEAD ~ said sleeve flange } and projecting inwardly toward the interior of said { TAIL ~ sleeve wall }
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL