NOW, that is a great suggestion.....
If you have access to the other side, you could use a reverse countersink tool.
Check https://www.mcmaster.com/reverse-countersinks/
Reverse countersink tool - very cool !
Anyway, countersinking without a microstop be very careful with the single flute cutters they will dig in quickly. 3 flute cutters are a little more gentle. This would assume working with a drill and eyeballing depth…
I would use a 100 degree countersink for 426 rivets. What would use a 50 degree. C/S for?Just be sure, when ordering, that you pay attention to the countersink angle. Aviation hardware is typically 50°.
I would use a 100 degree countersink for 426 rivets. What would use a 50 degree. C/S for?
If you have access to the other side, you could use a reverse countersink tool.
Check https://www.mcmaster.com/reverse-countersinks/