O le pine toso ulu faamalu o loʻo taʻua i le rivet tauaso o se pine toso ulu lapotopoto pe o se pine toso ulu faʻasūsū?

O pine toso ulu faamalu e ta'ua fo'i o pine toso ulu lapotopoto ma pine toso ulu pan. O le pito o le pine toso ulu countersunk e fa'asaga i lalo, ae o le pine toso ulu lapotopoto e fa'asaga i luga.

https://www.yukerivet.com/news/does-the-product-have-to-be-countersunk-to-evacuate-round-head-rivets/