{HEAD ~ The externally threaded end} of the plug has {TAIL ~ a solid end} with a circumferential groove adjacent to it and radial ports communicating with the axial passage way in order that packing can be expelled through the ports and the grooves substantially 360 degrees around the plug to insure even distribution of the packing 
has
{ HEAD ~ The externally threaded end } of the plug has { TAIL ~ a solid end } with a circumferential groove adjacent to it and radial ports communicating with the axial passage way in order that packing can be expelled through the ports and the grooves substantially 360 degrees around the plug to insure even distribution of the packing
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL TAIL 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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH