{HEAD ~ The notch} is located between the first end and the annular flange and houses {TAIL ~ a stem retaining ring} 
houses
{ HEAD ~ The notch } is located between the first end and the annular flange and houses { TAIL ~ a stem retaining ring }
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL