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