The bracket diameter is measured from a center axis extending through {HEAD ~ a center} of {TAIL ~ the truncated cone} 
The bracket diameter is measured from a center axis extending through { HEAD ~ a center } of { TAIL ~ the truncated cone }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL