Further, the annular protrusion second end can have a series of external threads on its outer surface for threaded engagement with {HEAD ~ a series} of {TAIL ~ internal threads} of a nut 
Further , the annular protrusion second end can have a series of external threads on its outer surface for threaded engagement with { HEAD ~ a series } of { TAIL ~ internal threads } of a nut
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH