Originally Posted by Sleddgracer
l've used a 17/64 for 1/4" rivets in other applications and it worked fine - no problems later on
I did some experiments on doing waterproof patches using the 17/64" for 1/4" rivets. All the rivets leaked a small amount and required Dynatron-550 sealant to be watertight. I wonder if they would leak less or not at all if the rivets were a tighter fit with the holes (seems obvious but you never know).
I just ordered a bunch of cobalt F bits from Amazon, after wasting an afternoon driving to Blowe's and Home Repo to learn they don't carry them.