A cut off passage way intersects with the axial passage way radially and is threaded to receive {HEAD ~ a cut off bolt} to seal {TAIL ~ the plug} 
A cut off passage way intersects with the axial passage way radially and is threaded to receive { HEAD ~ a cut off bolt } to seal { TAIL ~ the plug }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL