The plug is comprised of an externally threaded end insertable in {TAIL ~ the opening} and an axial passage way leading to an opposite end of the plug which has a threaded opening adapted to receive a nozzle of {HEAD ~ the packing gun} or the like for introduction of the packing 
The plug is comprised of an externally threaded end insertable in { TAIL ~ the opening } and an axial passage way leading to an opposite end of the plug which has a threaded opening adapted to receive a nozzle of { HEAD ~ the packing gun } or the like for introduction of the packing
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL 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 HEAD OTH OTH OTH OTH OTH OTH OTH OTH