retainer means disposed at said forward end of said applicator for engaging said tack to prevent axial displacement between said applicator and said {TAIL ~ tack} and to permit axial alignment between said hollow interior of {HEAD ~ said applicator} and said bore in said tack; and 
retainer means disposed at said forward end of said applicator for engaging said tack to prevent axial displacement between said applicator and said { TAIL ~ tack } and to permit axial alignment between said hollow interior of { HEAD ~ said applicator } and said bore in said tack ; and
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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH