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