Several joint embodiments utilize {HEAD ~ variable clearance} between the punch and {TAIL ~ the die} to minimize strength variability resulting from changing material thickness 
Several joint embodiments utilize { HEAD ~ variable clearance } between the punch and { TAIL ~ the die } to minimize strength variability resulting from changing material thickness
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH