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