{TAIL ~ The terminating edges} of the inward projections 15 from a center opening 14 of a diameter slightly smaller than the outside diameter of {HEAD ~ a hollow shank}, designated at 19 in FIG 5, of a button body 
{ TAIL ~ The terminating edges } of the inward projections 15 from a center opening 14 of a diameter slightly smaller than the outside diameter of { HEAD ~ a hollow shank } , designated at 19 in FIG 5 , of a button body
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 HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH