This second part 4 has, on its end side, {TAIL ~ a recess} 5 into which, during the application, {HEAD ~ the cap part} 2 is introduced, centered and clamped in place 
into is introduced
This second part 4 has , on its end side , { TAIL ~ a recess } 5 into which , during the application , { HEAD ~ the cap part } 2 is introduced , centered and clamped in place
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH REL OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL OTH OTH OTH OTH OTH OTH