In this manner a supple and effective seal can now be achieved between the male portion and the female portion at the same time as the locking component of the female portion, such a a screw thread or the like, can be formed in {HEAD ~ the outer coupling portion}, which can thus be manufactured from {TAIL ~ a harder or more rigid material} 
manufactured from
In this manner a supple and effective seal can now be achieved between the male portion and the female portion at the same time as the locking component of the female portion , such a a screw thread or the like , can be formed in { HEAD ~ the outer coupling portion } , which can thus be manufactured from { TAIL ~ a harder or more rigid material }
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