1. Push the mandrel out with your 3/32 punch.
2. Drill the head as you would with a normal rivet and snap it off. (pop rivets tend to spin around once the mandrel is out, but usually you can pry them off pretty easy)
Overall, they drill out pretty easy because once the mandrel is driven out, the remaining hole automatically guides your drill down the center of the hole, so enlarging it is not a major issue in myexpeirence.
Hope this helps. Good luck.
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Steve M.
Ellensburg WA
RV-9 Flying, 0-320, Catto
Donation reminder: Jan. 2021
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