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