Il-prodott irid jiġi countersunk biex jevakwa r-rivets tar-ras tondi?

Mhuwiex meħtieġ li jitfgħu toqob countersunk biex jinġibdu rivets b'irjus tondi evakwati.

https://www.yukerivet.com/news/do-countersunk-head-rivets-require-countersunk-holes/