The valley is located between the annular flange and {HEAD ~ the second end} and houses {TAIL ~ a nut retaining ring} 
The valley is located between the annular flange and { HEAD ~ the second end } and houses { TAIL ~ a nut retaining ring }
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL