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