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