The cap for the nut insert has a side section extending over the polygonal sides of the nut insert and an end section adapted to cover the second end of the nut insert, and the side sections terminates in a free end {HEAD ~ which free end} is welded to {TAIL ~ the nut insert} 
is welded to
The cap for the nut insert has a side section extending over the polygonal sides of the nut insert and an end section adapted to cover the second end of the nut insert , and the side sections terminates in a free end { HEAD ~ which free end } is welded to { TAIL ~ the nut insert }
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