This ensures that corners of {TAIL ~ the insert} and the recess will not interfere with {HEAD ~ the proper seating} of the insert 
This ensures that corners of { TAIL ~ the insert } and the recess will not interfere with { HEAD ~ the proper seating } of the insert
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH