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