FIG 4 illustrates a fastener 76 having a head portion 78 with {TAIL ~ a forwardly directed threaded shank} 80 and {HEAD ~ a rearwardly directed shank} 82 
FIG 4 illustrates a fastener 76 having a head portion 78 with { TAIL ~ a forwardly directed threaded shank } 80 and { HEAD ~ a rearwardly directed shank } 82
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH