The flanged portion 15c is provided at {HEAD ~ the outer circumference} of {TAIL ~ the body portion} 15a 
of
The flanged portion 15c is provided at { HEAD ~ the outer circumference } of { TAIL ~ the body portion } 15a
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH