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