Good report Al. It
is interesting that there are streaks from only the back side. Is it
possible that you have cleaned the front side but due to accessibility, didn't
clean the back side?
No; never did any
cleaning of the plate.
I received my close
tolerance bolts and swapped out the AN-6A bolts. The close tolerance
bolts were definitely snugger in the holes, but all could be installed by hand
without needing to be tapped or driven in with a hammer.
That’s true;
certainly not a press fit – but I don’t think it matters. With the 20
bolts torqued to about 20 in-lbs – beyond the torque needed to turn the lock
nuts – (I think that’s about the right number for these bolts; I’d have to
double check) the clamping force between the flange and the plate is so high
as to eliminate much in the way of shear forces on the bolts. If you’re
concerned, a thin film of JB weld on the bolts before putting them in would
eliminate any clearance – and
make it impossible to ever remove them.
Al