In {HEAD ~ the case} of the exemplary embodiment according to FIG 9, the cap 7 again has a cutting ring 31 overlapping the sleeve 3 on {TAIL ~ the outside} and having a multiple, steep thread 32 
In { HEAD ~ the case } of the exemplary embodiment according to FIG 9 , the cap 7 again has a cutting ring 31 overlapping the sleeve 3 on { TAIL ~ the outside } and having a multiple , steep thread 32
OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH