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Empennage Gap Cover RV-10

Blizzard

Active Member
Anyone have any tips or techniques on how to countersink the #36 holes you drill for a #6 screw head?? The holes get tapped for a #6 screw. The number 6 countersink bit doesn't fit in the hole because the bit guide is larger than a #36 hole.

Thanks
 
Thanks Kyle. Considered it earlier but wasn't sure about. Doesn't make a perfect hole but good enough for a dimple to sit in. Thanks
 
Use the #40 countersink bit that you use for -3 rivets. Best to drill first with #40 bit, CS then drill 36 and tap. It will still work if you already drilled it, but still best to do the countersinking before tapping.
 
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