The clearance between {HEAD ~ the punch} and the die recess are specifically sized relative to {TAIL ~ the material thickness} to achieve optimum fastening characteristics 
The clearance between { HEAD ~ the punch } and the die recess are specifically sized relative to { TAIL ~ the material thickness } to achieve optimum fastening characteristics
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH