a fastening cap having {TAIL ~ a bore} formed therein, said bore having a portion defined by a tapered inner wall portion, said tapered inner wall being brought into {HEAD ~ abutment} with said corned portion of said holder upon coupling of said fastening cap and said horn 
a fastening cap having { TAIL ~ a bore } formed therein , said bore having a portion defined by a tapered inner wall portion , said tapered inner wall being brought into { HEAD ~ abutment } with said corned portion of said holder upon coupling of said fastening cap and said horn
OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH